Online ovulation calculator for irregular cycles. How can you calculate the time of ovulation and create a calendar of days favorable for conception?
The main task of a woman on Earth is considered to be procreation. Of course, both a woman and a man participate in the process of conception, but will a representative of the fairer sex endure a pregnancy, will she give birth? healthy child- depends only on herself. Ovulation is necessary for fertilization to occur. Ovulation and conception are two interrelated conditions, because in the absence of ovulation, fertilization is impossible. Signs of ovulation are almost always noticed by a woman (consciously or not), so knowing them is necessary not only for planning long-awaited pregnancy, but also to prevent unwanted.
Menstrual cycle and its phases
To define the term “ovulation”, you should understand the concept of “menstrual cycle”.
During menstrual cycle functional and structural transformations, which affect not only the reproductive system, but also the rest (nervous, endocrine and others).
The formation of the menstrual cycle, which is physiological for female body, begins during puberty. The first menstruation or menarche occurs at the age of 12 - 14 years of girls and draws a line under the first period of puberty. The menstrual cycle is finally established after a year to a year and a half and is characterized by the regularity of menstrual bleeding and a relatively stable duration. During the specified time (1 - 1.5 years), the cycles of a teenage girl are anovulatory, that is, there is no ovulation, and the cycles themselves consist of two phases: follicular and luteal. Anovulation when a cycle begins is considered absolutely normal occurrence and is associated with insufficient production hubbub necessary for ovulation to occur. Around the age of 16, the menstrual cycle acquires its own individual characteristics, which persist throughout life and regular ovulation appears.
Physiology of the menstrual cycle
The average duration of the menstrual cycle ranges from 21 to 35 days. Duration menstrual bleeding is 3 – 7 days. For most women, the total cycle length is 28 days (75% of the population).
It is customary to divide the menstrual cycle into two phases, the boundary between which is ovulation (in some sources there is a separate ovulatory phase). All changes that occur periodically and are repeated approximately every month in a woman’s body, in particular in reproductive system, aimed at ensuring complete ovulation. If this process does not occur, the cycle is called anovulatory, and the woman, accordingly, is infertile.
Phases of the “female” cycle:
First phase
In the first phase (another name is follicular), the pituitary gland begins to produce follicle-stimulating hormone, under the influence of which the process of proliferation (maturation) of follicles or folliculogenesis starts in the ovaries. At the same time, over the course of one month, about 10–15 follicles begin to actively grow in the ovary (either in the right or in the left), which become proliferating or maturing. Maturing follicles, in turn, synthesize estrogens necessary for the final completion of the maturation process dominant follicle, that is, they are temporary glands. Under the influence of estrogen, the main (dominant) follicle forms a cavity around itself, which is filled with follicular fluid and where the egg “ripens”. As the dominant follicle grows and a cavity forms around it (now called the Graafian vesicle), follicle-stimulating hormone and estrogens accumulate in the follicular fluid. As soon as the process of maturation of the egg is completed, the dominant follicle sends a signal to the pituitary gland, and it stops producing FSH, as a result of which the Graafian vesicle ruptures and a mature, full-fledged egg is released into the “light.”
Second phase
So what is ovulation? The second phase (conventionally) is called ovulatory, that is, the period when the Graafian vesicle ruptures and the egg appears in the free space (in this case, in abdominal cavity, often on the surface of the ovary). Ovulation is the process of direct release of an egg from the ovary. The rupture of the main follicle occurs under the “banner” of luteinizing hormone, which begins to be secreted by the pituitary gland after a signal is given to it by the follicle itself.
Third phase
This phase is called the luteal phase, as it occurs with the participation of luteinizing hormone. As soon as the follicle bursts and “releases” the egg, the granulosa cells of the Graafian vesicle begin to form corpus luteum. During the process of granulosa cell division and formation of the corpus luteum, progesterone begins to be synthesized along with the pituitary gland secreting LH. The corpus luteum and the production of progesterone are designed to preserve the egg in case of fertilization, ensure its implantation into the uterine wall and maintain pregnancy until the placenta is formed. The formation of the placenta is completed by approximately 16 weeks of pregnancy and one of its functions includes the synthesis of progesterone. So, if fertilization has occurred, then the corpus luteum is called the corpus luteum of pregnancy, and if the egg does not meet the sperm, then the corpus luteum undergoes reverse changes (involution) by the end of the cycle and disappears. In this case, it is called the corpus luteum of menstruation.
All the described changes affect only the ovaries and are therefore called the ovarian cycle.
Uterine cycle
Speaking about the physiology of the menstrual cycle and the ovulation cycle, it should be noted structural changes, which occur in the uterus under the influence of certain hormones:
Desquamation phase
The first day of the menstrual cycle is considered to be the first day of menstruation. Menstruation represents the rejection of the overgrown functional layer of the uterine mucosa, which was ready to receive (implant) a fertilized egg. If fertilization does not occur, then desquamation of the uterine mucosa occurs along with blood - menstrual bleeding.
Regeneration phase
Follows the desquamation phase and is accompanied by restoration of the functional layer with the help of reserve epithelium. This phase begins during bleeding (at the same time the epithelium is rejected and restored) and ends on the 6th day of the cycle.
Proliferation phase
It is characterized by the proliferation of stroma and glands and coincides in time with the follicular phase. With a 28-day cycle, it lasts up to 14 days and ends when the follicle matures and is ready to rupture.
Secretion phase
The secretory phase corresponds to the phase of the corpus luteum. At this stage, thickening and loosening of the functional layer of the uterine mucosa occurs, which is necessary for the successful introduction of a fertilized egg into its thickness (implantation).
Signs of ovulation
Knowing its signs will help determine the day of ovulation, for which you need to pay great attention to your body. Of course, ovulation cannot always be suspected, because its manifestations are very subjective and sometimes go unnoticed by a woman. But changes in hormonal levels that occur every month make it possible to “calculate” and remember the sensations during ovulation and compare them with those that occur again.
Subjective signs
Subjective signs of ovulation include those that the woman herself feels and which only she can tell about. Another name for subjective signs is sensations:
Stomach ache
One of the first signs of ovulation is considered painful sensations lower abdomen. On the eve of follicle rupture, a woman may feel, but not necessarily, a slight tingling sensation in the lower sections abdomen, usually on the right or left. This indicates a maximally enlarged and tense dominant follicle, which is about to burst. After its rupture, a small wound, a few millimeters in size, remains on the lining of the ovary, which also bothers the woman. This is manifested by minor aching or nagging pain or discomfort in the lower abdomen. Such sensations disappear after a couple of days, but if the pain does not go away or is so acute that it disrupts your usual way of life, you should consult a doctor (ovarian apoplexy is possible).
Mammary gland
There may be pain or increased sensitivity in the mammary glands, which is associated with hormonal changes. The production of FSH stops and the synthesis of LH begins, which is reflected in the chest. It becomes swollen and rough and becomes very sensitive to touch.
Libido
Another characteristic subjective sign of approaching and occurring ovulation is increased libido ( sexual desire), which is also due hormonal changes. It is so predetermined by nature that it ensures procreation - since the egg is ready for fertilization, it means that sexual desire needs to be strengthened to increase the likelihood of sexual intercourse and subsequent pregnancy.
Increased sensations
On the eve and during the period of ovulation, a woman notes an aggravation of all sensations ( increased sensitivity to smells, changes in color perception and taste), which is also explained hormonal changes. Not excluded emotional lability and sudden changes in mood (from irritability to joy, from tears to laughter).
Objective signs
Objective signs (symptoms of ovulation) are those that are seen by the examining person, for example, a doctor:
Cervix
During a gynecological examination during the ovulatory phase, the doctor may note that the cervix has softened somewhat, the cervical canal has opened slightly, and the cervix itself has risen upward.
Edema
Swelling of the extremities, most often the legs, indicates a change in the production of FSH to the production of LH and is visible not only to the woman herself, but also to her relatives and the doctor.
Discharge
During ovulation they change their character and vaginal discharge. If in the first phase of the cycle a woman does not notice stains on her underwear, this is due to a thick plug that clogs the cervical canal and prevents entry into the uterine cavity infectious agents, then during the ovulatory stage the discharge changes. The mucus in the cervical canal dilutes and becomes viscous and viscous, which is necessary to facilitate the penetration of sperm into the uterine cavity. Cervical mucus looks like egg white, stretches up to 7 - 10 cm and leaves noticeable stains on the laundry.
Blood in the discharge
Another characteristic objective, but optional, sign of ovulation. Blood in the discharge appears in very small quantities, so the woman may not notice this symptom. One or two drops of blood enter the fallopian tube, then into the uterus and into the cervical canal after rupture of the dominant follicle. Rupture of the follicle is always accompanied by damage to the tunica albuginea of the ovary and the release of a small amount of blood into the abdominal cavity.
Basal temperature
This symptom can only be identified by a woman who regularly keeps a schedule. basal temperature. On the eve of ovulation, a slight (0.1 - 0.2 degrees) drop in temperature occurs, and during the rupture of the follicle and after the temperature rises and remains above 37 degrees.
Ultrasound data
An increase in the size of the dominant follicle and its subsequent rupture are reliably determined using ultrasound.
After ovulation
Some women, especially those who use calendar method protection from pregnancy, you are interested in symptoms after ovulation has occurred. In this way, women calculate “safe” days regarding unwanted pregnancy. These signs are very uncharacteristic and may coincide with early symptoms pregnancy:
Vaginal discharge
As soon as the egg is released from the main follicle and dies (its lifespan is 24, maximum 48 hours), the discharge from the genital tract also changes. Vaginal leucorrhoea loses its transparency, becomes milky, possibly interspersed with small lumps, sticky and does not stretch well (see).
Pain
Within one to two days after ovulation, discomfort and minor pain in the lower abdomen disappear.
Libido
Sexual desire gradually fades away, since now there is no point for sperm to meet with the egg, it has already died.
Basal temperature
If at the moment of rupture of the Graafian vesicle the basal temperature is significantly higher than 37 degrees, then after ovulation it decreases by several tenths of a degree, although it remains above 37 degrees. This sign unreliable, since even if conception occurs, the basal temperature will be above 37 degrees. The only difference is that by the end of the second phase (before the start of menstruation), the temperature will drop to 37 degrees or below.
Acne
On the eve and at the moment of ovulation, hormonal changes occur in the body, which affects the condition of the facial skin - appears acne. Once ovulation is complete, the rash gradually disappears.
Ultrasound data
An ultrasound can reveal the dominant follicle that has collapsed due to rupture, a small amount of fluid in the retrouterine space, and the later forming corpus luteum. Ultrasound data are most indicative in the case of dynamic research (maturation of follicles, determination of the dominant follicle and its subsequent rupture).
Signs of conception
Before talking about the signs of pregnancy after ovulation, it is worth understanding the terms “fertilization” and “conception.” Fertilization, that is, the meeting of the egg with the sperm, occurs in the fallopian tube, from where the fertilized egg is sent to the uterus. In the uterine cavity, the fertilized egg chooses the most convenient place and attaches to uterine wall, that is, it is implanted. After implantation has occurred, a close connection is established between the maternal body and the zygote (future embryo), which is supported by changes hormonal levels. The process of securely fixing the zygote in the uterine cavity is called conception. That is, if fertilization has taken place, but implantation has not yet occurred, this is not called pregnancy, and some sources indicate a term such as “biological pregnancy.” Until the zygote is firmly established in the thickness of the endometrium, it can be expelled from the uterus simultaneously with menstrual flow, which is called a very early miscarriage or termination of biological pregnancy.
Signs of conception are very difficult to determine, especially for an inexperienced woman, and appear approximately 10 to 14 days after ovulation:
Basal temperature
At possible pregnancy basal temperature remains high, about 37.5 degrees, and does not decrease before the expected menstruation.
Implantation retraction
If in the second phase of the cycle after ovulation the basal temperature remains elevated (more than 37) almost until the onset of menstruation, then at the moment the zygote implants into the uterine mucosa, it slightly decreases, which is called implantation retraction. Such a drop is characterized by a mark below 37 degrees, and the next day by a sharp jump in temperature (more than 37 and higher than it was after ovulation).
Implantation bleeding
When a fertilized egg tries to settle in the thickness of the uterine mucosa, it somewhat destroys it and damages nearby small vessels. Therefore, the implantation process, but not necessarily, is accompanied by small bloody discharge, which can be noticed in the form of pinkish spots on the underwear, or one or two drops of blood.
Change in well-being
From the moment of implantation, a shift in hormonal levels occurs, which is manifested by lethargy, apathy, possibly irritability and tearfulness, increased appetite, changes in taste and olfactory sensations. Also on early stages Several pregnancies can be noted elevated temperature body, which is associated with the influence of hormones (progesterone) on the thermoregulation center. This phenomenon absolutely normal for pregnancy and is aimed at suppressing the mother’s body’s immunity and preventing miscarriage. Many women take a rise in temperature and deterioration in well-being as the first signs of ARVI.
Discomfort in the lower abdomen
Some discomfort or even cramps in the lower abdomen for one, maximum two days are also associated with the implantation of the zygote and are absolutely physiological.
Mammary gland
Increased sensitivity, swelling and soreness in the mammary glands persists after ovulation. The possibility of conception is indicated by a slight increase in these symptoms.
Delayed menstruation
If menstruation has not started, it’s time to take a pregnancy test and make sure you’re right.
When does ovulation occur and how long does it last?
All women are interested in when ovulation occurs, because this is important for calculation auspicious days for conception or to prevent unwanted pregnancy. As already indicated, the ovulatory period is the time that lasts from the moment the main follicle ruptures until a full-fledged egg enters the fallopian tube, where it has every chance of being fertilized.
It is impossible to determine the exact duration of the ovulatory period, due to the fact that even for a particular woman it can change in each cycle (lengthen or shorten). On average, the entire process takes 16 – 32 hours. It is the process, not the viability of the egg. But the lifespan of a released egg is simpler, and this time is 12 – 48 hours.
But if the lifespan of an egg is quite short, then sperm, on the contrary, remain active for up to 7 days. That is, if sexual intercourse took place on the eve of ovulation (a day or two before), then it is quite possible for the “fresh” egg to be fertilized by sperm that were “waiting” for it in the tube and have not lost their activity at all. It is on this fact that the calendar method of contraception is based, that is, the calculation of dangerous days (3 days before ovulation and 3 days after).
When it comes
A simple calculation will help determine the days of ovulation, but approximately. Ovulation occurs at the end of the first phase of the cycle (follicular). To know on what day a certain woman ovulates, she needs to know the duration of her cycle ( we're talking about about regular cycles).
Duration follicular phase It’s different for everyone and ranges from 10 to 18 days. But the duration of the second phase is always the same for all women and corresponds to 14 days. To determine ovulation, it is enough to subtract 14 days from the entire length of the menstrual cycle. As a result, it turns out that if the cycle lasts 28 days (minus 14), we get the 14th day of the cycle, which will mean the approximate day the egg is released from the follicle.
Or the cycle lasts 32 days, minus 14 - we get the approximate 18th day of the cycle - the day of ovulation. Why, when talking about such a simple calculation, is it called approximate? Because the menstrual cycle, and especially the ongoing ovulation, are very sensitive processes and depend on many factors. For example, ovulation may occur prematurely (early) or late (late).
The onset of early rupture of the follicle and release of the egg can be triggered by the following factors:
- significant stress;
- lifting weights;
- significant sports loads;
- frequent coitus;
- hazardous production;
- a common cold;
- change in climate, lifestyle or diet;
- excessive smoking or drinking alcohol;
- sleep disturbance;
- hormonal imbalance;
- taking medications.
ABOUT late ovulation they say if it happens (with a 28-day cycle) on the 18th – 20th day. The reasons for this process are the same as the factors that provoke the early rupture of the main follicle.
How to calculate ovulation
All women need to know how to calculate ovulation, especially those who have tried for a long time and unsuccessfully to get pregnant. For this purpose, there are several developed methods for determining ovulation. All methods can be conditionally divided into “biological” and “official”, that is, laboratory and instrumental.
Calendar method
- cycle duration (it should not be too short, for example, 21 days and not very long, 35 days) – optimal duration is 28 – 30 days;
- regularity - ideally, menstruation should come “day after day”, but a deviation of +/- 2 days is allowed;
- the nature of menstrual flow - menstruation should be moderate, without clots and no more than 5 - 6 days, and the nature of the flow should not change from cycle to cycle.
We subtract 14 from the length of the cycle (the length of the luteal phase) and conditionally take the day of ovulation (it can shift). We mark the calculated date on the calendar and add 2 days to 2 days after - these days are also considered favorable for fertilization.
Basal temperature
A more reliable method is the method of calculating ovulation using a basal temperature chart. To calculate favorable days for conception, the following conditions must be met:
- measurement of basal, that is, in the rectum, temperature for at least three months;
- drawing up a schedule (this item is required) of basal temperature;
- measurements should be taken in the morning, after a night's sleep, at the same time and without getting out of bed.
According to the compiled schedule, we mark the first phase of the cycle, during which the temperature will remain below 37 degrees, then a pre-ovulatory decrease during the day (by 0.1 - 0.2 degrees), a sharp rise in temperature (by 0.4 - 0.5 degrees) and subsequent temperature stay above 37 degrees (second phase). Sudden jump and will be considered the day the egg leaves the Graafian vesicle. We mark this day on the calendar and also do not forget about 2 days before 2 days after.
Tests to determine ovulation
Special tests for identifying the ovulatory process can be easily purchased at any pharmacy (see). The tests are based on identifying high level luteinizing hormone in any biological fluid(blood, urine or saliva). Positive test indicates the release of a mature egg from the ovary and its readiness for conception.
Gynecological examination
When conducting gynecological examination the doctor can quite reliably identify signs of ovulation using tests functional diagnostics. The first is a method for determining the distensibility of cervical mucus. The forceps captures mucus from the external pharynx of the cervix, and then its branches are separated. If the mucus is viscous and the separation of the jaws reaches 10 cm or more, this is considered one of the symptoms of ovulation. The second is the “pupil method”. Expanding mucus in cervical canal stretches it, including the external pharynx, and it becomes slightly open and round, like a pupil. If the external pharynx is narrowed and there is practically no mucus in it (“dry” neck), then this indicates the absence of ovulation (it has already passed).
Ultrasound – follicle measurement
This method allows you to determine with a 100% guarantee whether ovulation has occurred or not. In addition, using ultrasound folliculometry, you can create your own menstrual cycle schedule and ovulation calendar and find out whether it is approaching or completed. Characteristic ultrasound signs of upcoming ovulation:
- growth of the main follicle plus expansion of the cervical canal;
- identification of the main follicle that is ready to rupture;
- control of the corpus luteum, which forms at the site of the burst follicle, detection of fluid in the retrouterine space, which indicates ovulation has occurred.
Hormonal method
This method is based on determining the amount of estrogen and progesterone in the blood. The latter begins to be released in the second phase of the cycle, when the resulting corpus luteum begins to function. About 7 days after the egg is released from the ovary, progesterone in the blood increases, which confirms that ovulation has occurred. And the day before and on the day of ovulation, estrogen levels decrease significantly. The method is labor-intensive and requires repeated blood donations and finances.
Lack of ovulation
If there is no ovulation, similar phenomenon called anovulation. It is clear that in the absence of ovulation, pregnancy becomes impossible. It should be noted that healthy woman childbearing age Up to two to three anovulatory cycles per year are observed, which is considered normal. But if there is no ovulation all the time, then they talk about chronic anovulation and you should look for the reasons this state, since the woman is diagnosed with “Infertility”. Causes of chronic anovulation include:
- thyroid diseases;
- overweight or obesity;
- polycystic ovary disease;
- diabetes;
- lack of weight;
- hyperprolactinemia;
- ovarian dysfunction;
- chronic inflammation of the ovaries;
- endometriosis of the ovaries and uterus (hormonal imbalance in general);
- constant stress;
- excessive physical exercise(sports, household);
- harmful working conditions;
- pathology of the adrenal glands;
- tumors of the pituitary gland or hypothalamus and other pathologies.
The following factors can lead to temporary (transient) anovulation:
- pregnancy, which is natural, no menstrual cycle, no ovulation;
- breastfeeding (most often during lactation there are no menstruation, but there may be, but the cycle is usually anovulatory);
- premenopause (ovarian function is fading, so the cycles will be anovulatory rather than ovulatory);
- taking contraceptive pills;
- stress;
- following a specific diet for weight loss;
- increase in body weight or its sharp decrease;
- change of usual environment;
- climate change;
- change of usual working conditions.
If there is no ovulation, what should you do? First of all, you should consult a doctor who will determine what caused this condition and how serious it is (chronic or temporary anovulation). If anovulation is temporary, the doctor will recommend adjusting your diet, stopping worrying and avoiding stress, changing your job (for example, one involving night shifts to day shifts), and taking vitamins.
In case of chronic anovulation, the gynecologist will definitely prescribe additional examination:
- sex hormones (estrogens, progesterone, prolactin, testosterone, FSH and LH) and adrenal and thyroid hormones;
- Ultrasound of the pelvic organs;
- colposcopy (according to indications);
- hysteroscopy (according to indications);
- diagnostic laparoscopy.
Depending on the identified cause, appropriate treatment is prescribed, the final stage which is the stimulation of ovulation. Basically, clostilbegit or clomiphene are used to stimulate ovulation, usually in combination with gonadotropic hormones (Menopur, Gonal-F). Ovulation stimulation is carried out during three menstrual cycles, and if there is no effect, the stimulation cycle is repeated after three cycles.
Question answer
Yes, such online calendars are quite suitable for calculating ovulation days, but their effectiveness reaches only 30%, which is based on the calendar method for determining ovulation.
Question:
At irregular cycle Will there be chronic anovulation?
Yes, irregular cycles are more often anovulatory, although this is controversial. Even if your periods “jump” every month, ovulation may occur, but, as a rule, not in the middle of the cycle, but at the beginning or end.
This method is unreliable and has not been scientifically confirmed, but there is a hypothesis that “female” sperm, that is, those that contain the X chromosome, are more tenacious, but slower. Therefore, in order to give birth to a girl, it is necessary to have sexual intercourse two to three days before expected ovulation. It is during this time that the slow X sperm will reach the released egg and fertilize it. If you have sexual intercourse at the peak of ovulation, then the fast “male” sperm will outstrip the female ones and you will have a boy.
I repeat, the method is unreliable. Spermatozoa containing the Y chromosome or “male” are more nimble and mobile, but are very sensitive to acidic environment, which is in the vagina, so sexual intercourse should take place exactly on the day of ovulation, which must be confirmed by ultrasound. “Male” sperm, despite their activity, die very quickly, but if coitus took place on the day of ovulation, their death will not yet occur, and “male” sperm will reach the egg faster than “female” ones and fertilize it.
Question:
I play professional sports. Could this cause a lack of ovulation?
Certainly. Professional sports loads are very significant, which not only leads to persistent anovulation, but also to disruptions in the functioning of the hypothalamic-pituitary-adrenal-ovarian system. Therefore, you have to choose, either professional sports and fame, or the birth of a child.
Calculation of the day of ovulation, menstrual cycle and days favorable for conception and pregnancy.
Using this calendar you can calculate the days ovulation, that is, when the probability of pregnancy is maximum and determine the most favorable days for conceiving a child (boy or girl) without pharmacy ovulation tests for determining days of ovulation. The conception calendar helps women planning pregnancy to calculate the days of ovulation and create a personal conception calendar. You can chart your female menstrual cycle months in advance! You'll get menstrual calendar for 3 months which will indicate: ovulation day, days favorable for conception, days to conceive a boy and a girl. Do not confuse the duration of menstruation (period) and the duration of the menstrual cycle! Interactive ovulation calendar: hover over a day on the calendar and read additional information.
We increase the likelihood of getting pregnant
If you and your loved one decide to have a child, but you do not have regular sexual relations, an ovulation and conception calendar will help you.
This is such a convenient thing that will show on what day the probability of starting a pregnancy is higher. But before we use it, let's figure out what it is and how it works.
The calculator performs simple calculations for the next few months, showing you when the next ovulation will occur, unless unforeseen events, illnesses or any deviations occur.
This information is necessary for every woman hoping for imminent pregnancy. And the calculator can provide it. Receiving the beginning and length of the menstrual cycle instead of input data, he describes the entire period step by step.
What is ovulation?
First, we need to understand what ovulation is and how it affects pregnancy.
Ovulation is a special day in the menstrual cycle when there is a high probability that conception will be successful. How does a child appear? The egg needs to be fertilized.
About a week after the end of menstruation, a new egg has already matured in the woman’s body, ready to become a baby. If you fertilize it on time, you will get a fruit. If you do not fertilize, in another week and a half a new period will begin.
But that one special period, lasting no more than two days, shows when the uterus is ready to accept the embryo and the egg is ready to be fertilized. Unfortunately, the lifespan of an egg is short - from 12 to 36 hours.
Therefore, it is very important to know exactly when ovulation occurs so as not to miss the right time.
For men, such a calendar is not needed - sperm live long and are constantly renewed. So your partner is ready to conceive a child any day if he wants it.
How to calculate the moment?
You don't have to do the calculations yourself. For this, there are many online programs that allow you to quickly and free calculate your ovulation date.
This calculator will save you time and easily tell you when to make your sex life more active to start pregnancy. You will receive a convenient calendar on which everything will be marked simply and clearly.
To calculate the date of ovulation, you need to know only two things: the days of the beginning of the last and penultimate menstruation. If you have an irregular cycle, it is better to take more dates. Look at the period between them and get the cycle length.
If the numbers are different for different months, then we take the latter. These calculation conditions are easy to remember: it is rare that a woman does not remember when her period began.
When you enter in online calculator the day of your last menstruation and the length of your cycle, the program will be able to calculate your entire period. The probable day of your next period will be marked in red.
Light green – the middle of the luteal phase. This is the time when the egg appears and develops. These days are the average probability of starting a pregnancy.
Green color indicates the day of ovulation, the highest probability of conceiving a baby. But this does not mean that the calculator is 100% correct and you need to try hard only at this time.
Sometimes the egg is ready and alive a little earlier or a little later. Therefore, the approximate time is the day marked in green, plus or minus another day.
Such online calendar allows you to know the most important ones several months in advance lucky days. You can print it out and put it in your desk so you can refer to the dates. In addition, the calendar will remind you of your upcoming period.
Other signs of ovulation
The middle of the cycle is far from the only landmark of a good time for pregnancy. The days when the egg is most ready for fertilization will be slightly different from the rest.
For example, estrogens affect a woman’s body even during the development of the egg, even before it is fertilized, before pregnancy begins. And these changes can be tracked:
- A slightly viscous discharge appears from the genitals. This does not last long, a couple of days at most.
- On the day of ovulation, a woman's temperature drops slightly. It may not be very noticeable, but if you measure it every day, small deviations will help calculate the time of ovulation.
- Lightweight It's a dull pain, as if you slightly pulled your abdominal muscles. It does not always appear, but is often a consequence of ongoing ovulation.
- Increased sexual excitability.
The online calculator will provide you with a calendar that allows you to narrow down the period of greatest activity.
But it has other uses too. Such a calendar may not be the most accurate, but it is still a method of contraception.
But remember: there is always the possibility of error, for example with an irregular cycle. The calendar cannot be considered an ideal remedy for pregnancy.
Many believe that conception relative to ovulation greatly influences the sex of the child. If the child was conceived before ovulation, most likely it will be a girl, and if after, it will most likely be a boy. Believe it or not - it's up to you. However, knowing your cycle will help you a lot.
The female body is a very complex and perfect system. And only lovely ladies are awarded the unique ability to reproduce. Responsible for this function reproductive organs, A main role ovaries play. It is in them that the egg is formed and grows, which is fertilized. From it the primary embryo is formed.
Ideally, every month a healthy cell emerges from the ovary, from which all the cells of the new organism are formed. But, unfortunately, there are many factors in life that influence this difficult process. Therefore, there are many ways that help you figure out how to calculate the day of ovulation.
Accuracy in counting
Each woman, carrying out complex calculations, pursues completely different goals. Some people dream of adding to their family, while others try to calculate the days on which it is impossible to conceive. Essentially, the “theory” works for both sides. But scientists say that ovulation is a natural process that can hardly be called constant and unchanging. Even for a healthy lady, this phenomenon does not occur every month! There are about 9-10 full cycles per year. Moreover, it is sometimes difficult to calculate the exact date ripening of the egg due to How to calculate the day of ovulation? It is necessary to take into account the influence of many factors:
- hormonal changes;
- cycle length;
- woman's well-being;
- external factors.
Only A complex approach will allow you to more accurately determine the moment of release of the egg from the ovary.
Reliable contraception
I would like to immediately note that if you intend to use ovulation data to prevent pregnancy, these calculations are not always relevant! lives very briefly, about 24-48 hours, but male sperm able to remain “mobile” for up to 5 days. Therefore, sexual intercourse before and after ovulation for 5 days is considered “unprotected” from fertilization.
And there are situations when 2 cells can mature in the ovary at once and this happens, for example, 2 times a month. Be extremely careful when using these calculations. It's worth checking out all of them in detail. existing methods definitions of ovulation that can be applied in practice.
Calendar method
This method of tracking a ripening cell is quite simple and widely used. In order to use it, you need to accurately track it for six months. Exactly from up-to-date information The length of the cycle will depend on the question of how to accurately calculate the day of ovulation. Be sure to write down the dates of bleeding and its duration.
As a rule, it lasts about 14 days for women. And although the number of days in a cycle may vary, ovulation occurs 14 days before next menstruation. That is, it is worth carrying out a simple calculation: 28 - 14 = 14, where 28 is the estimated duration of menstruation, 14 is the luteal phase, 14 is the day of expected ovulation (counted from the day the next bleeding occurs).
This method is perfect for ladies with “established” regular cycle. However, pay attention to your most short menstruation. To establish which day begins favorable period for conception, subtract 18 from the “small” cycle. But the last “suitable” day can be found by subtracting 11 from this number. Ovulation occurs on the day that you calculate through constant monitoring of your cycle.
Temperature option
Doctors suggest another one exact method to track mature cells. By measuring basal temperature, you can see a change in the general background in the body. How to calculate the day of ovulation using a thermometer?
The fact is that in the first phase of the cycle in women estrogen predominates, but in the second phase progesterone predominates. These changes can be easily monitored by taking temperature measurements in the anus. This should be done every morning without getting out of bed.
However, this method requires regular recording and scheduling. Temperature observations must be recorded daily. As a rule, its indicator in the first phase is 36.5-37 °C, but after ovulation it sharply “jumps” from 37 to 37.5 °C. The day on which changes are observed is the day the egg leaves the follicle.
Natural secretions
You can try to determine the “suitable” day based on the body’s reaction. When a cell leaves the ovary, it changes hormonal background, a thicker and more viscous lubricant appears. It is she who helps the sperm move into the uterus. Record changes in cervical mucus every day. Run your finger along the vaginal wall - and if you observe an elastic, viscous and sticky lubricant, this may indicate that ovulation occurs on the day of the cycle, which corresponds to the beginning of the luteal phase. To make sure the information is up to date, monitor your discharge for several months.
Special tests
If it is unacceptable for you to keep records or measure every day, you can use them. They are special strips or cassettes on which a sensitive reagent is applied. A woman should use a calendar to determine the approximate period of cell maturation and start using the test 3-5 days before ovulation. This method “works” by increasing progesterone in the urine. It is necessary to conduct research twice a day, at the same time. This is what will allow you not to miss the right moment.
The first day of ovulation will be reflected in the test field with two bright red stripes. However, if you use tests, you need to consider some features:
- The best time to explore is from 10 am to 8 pm.
- Morning urine is not used.
- You should not drink a lot 1-3 hours before the test.
- The result on the control field can be assessed within 30 minutes.
How to calculate the day of ovulation, based on the data obtained, in order for conception to occur or for contraception? In fact, any method outlined above may work for you. But remember: no result can be considered 100% correct information. After all, each organism is individual, and there are enough factors that affect hormone levels. If you want not to miss an “important” day, contact your doctor, who may prescribe an ultrasound to check for follicle growth and the onset of ovulation.
Some women calculate the day of ovulation in order to get pregnant safely, while others, on the contrary, want to avoid conception. Since ovulation is the process of the release of a developed egg from the ovary, which is fully prepared for fertilization, this period is the only favorable one for pregnancy.
This means that a woman who wants to become a mother needs to be active at this time. sex life. And that girl who does not yet want to have a child should abstain from sexual intercourse during these dangerous days or use reliable protection. How to calculate ovulation so as not to make a mistake? Ovulation can be calculated in many ways. Let's consider each method in detail.
Feelings during ovulation
Sometimes women feel the days of ovulation, since at this time some changes occur in the body:
- A woman may feel slight pain in the lower abdomen.
- Vaginal discharge increases.
- Ovulation also affects sexual attraction, which becomes much stronger than on ordinary days.
Calendar method
In order to use this method, you need to study your body well and know everything about your own menstrual cycle. At the same time, it is important to keep a calendar and mark the days of your menstruation there. Data for the past six months will be useful for the calculation. As a rule, the menstrual cycle lasts 27-32 days. You should count on the calendar how many days have passed from the first day of the past women's days to the onset of the current ones. This number will tell you how long your cycle lasts.
If during the calculation it became clear that the interval between menstruation is the same all the time, this means that the cycle is regular and this method is suitable for calculating the day of ovulation.
Now you need to look at your calendar entries and determine the shortest cycle that occurred within the last six months. From this number you need to subtract 18. The resulting number is the day from which the suitable period for conception begins. Next, you can find out which day of the cycle is the last favorable day. From the longest cycle you need to subtract the number 11. Now you know how to calculate the day of ovulation using the calendar method.
But it is worth remembering that the shift in ovulation days can be affected by anything: health, stress, taking certain medications, lifestyle changes, etc.
Basal temperature
How to calculate the ovulation period based on basal temperature? Ovulation has little effect on a woman's body temperature. Therefore, this method can be used to determine the days of ovulation. This reliable way unlike the calendar one, the data will be more accurate. On the day of ovulation, when the egg is released from the ovary, the body temperature is slightly reduced. And after this day, the temperature, on the contrary, rises and remains at the same level until the first day of the next women's days.
You need to measure your temperature from the first day of your next period. So, immediately after you open your eyes in the morning, without getting out of bed, place the thermometer in anus, approximately four centimeters. Thus, the temperature should be measured strictly at the same time every day. All data must be recorded. Before ovulation, the temperature, if the woman is healthy, remains at the same level - 36.6.
As soon as there is a decline, even a small one (36.3), this means that it was on that day that the ovary released a mature egg. And the next day it will happen sharp increase temperatures up to 37 degrees – this is the best time for fertilization. However, we should not forget that an increase in temperature can occur as a result of any disease, or due to lack of sleep or alcohol consumption.
Such observation must be carried out three to four cycles in a row. If after long check a woman sees on the schedule that ovulation always occurs precisely on the same day of the period (for example, on the fourteenth or fifteenth day of the cycle), then she can be sure that this method is suitable for her. The best time for pregnancy is usually considered to be from the tenth to the nineteenth day from the beginning of the menstrual cycle, that is, the day of ovulation itself, 5 days before its onset and 3 days after it are taken into account. Accordingly, the safe periods are up to the tenth day of the cycle and from 10 to 28 days.
Test strips
Today, to calculate ovulation there is also modern methods. Such strips are sold at any pharmacy; they are very similar to pregnancy tests.
Test strips detect the most suitable days for conception. They respond to the content of gteinizing hormone in the urine. A large number of This hormone appears in the urine 24-36 hours before ovulation. That is, when the test becomes positive, this indicates that the favorable moment has come for pregnancy.
However, it is important to know that if ovulation occurs in the morning, and the test is done in the evening, then it is likely that by that time the level of the hormone will have already decreased and the strip will show negative result. The level of the hormone LH, which is necessary to determine ovulation, remains in the urine for only 24 hours. As a result, the conclusion suggests itself - it is better to do the test twice a day so as not to miss this moment.
When using the test, it is important to follow some recommendations and rules:
- The test must be performed at the same time every day.
- You can choose any time between ten in the morning and eight o'clock in the evening.
- The first morning urine is not suitable for testing.
- Reduce fluid intake 1-3 hours before the test.
- Testing will not make sense if the woman is taking medications, which contain LH.
Be sure to follow all manufacturer's recommendations contained in the instructions. Results can be assessed 1-30 minutes after testing. At the expiration of given period It is not recommended to take the results into account.
The result could be:
- Positive - the test line is very bright, the color is similar to or darker than the control line.
- Negative result - one test line is much lighter than the control line.
- Error in execution - there is no control line on the test.
An ovulation test can sometimes be a false negative. Why could this be? As always, there are several reasons: in the body of each woman during ovulation, an unequal amount of the LH hormone is formed, different time testing, ovulation tests are different, which means they may have different sensitivity, different urine concentrations (affected by the amount of fluid you drink).
All this makes it difficult to determine favorable days, which is why you will have to adapt to ovulation tests for some time. It is better to combine them with the measurement first rectal temperature, calendar method and monitor the nature of cervical discharge.
Disadvantages of tests
Carrying out such tests requires the expenditure of significant material resources, since they need to be carried out over a week or even more. If testing is carried out once a day, then there is a risk of missing the moment of ovulation. In addition, with an irregular cycle, you cannot completely rely on test results.
We calculate by allocations
How to calculate the time of ovulation by discharge? Discharge is cervical mucus, which changes during the menstrual cycle. Therefore, every day you should keep notes about the nature of such discharge. Swipe away anterior wall vagina to the back. The mucus will vary in consistency (elastic, thick, sticky), color (white, yellow, transparent) and texture (dry or wet). On the day when ovulation occurs, the discharge is the most transparent and has an elastic and slippery structure.
How to calculate ovulation if your cycle is irregular?
If the cycle is irregular, then only ultrasound monitoring of follicle growth can help. Of course, if you only need accurate results. You can rely on the method of measuring basal temperature, but still, due to the shift in the cycle, it will be more difficult to do this, and the result will be unreliable.
The first examination must be done on the seventh day of the cycle, the second on the eleventh. When an ultrasound shows that the follicle has reached a size of 20 mm, this means that ovulation will soon occur. This method will also help to find out whether the follicle has ruptured or whether the egg has been released. If a gap occurs, a corpus luteum will form in its place.
If suddenly there is no rupture, then this is unovulated follicle syndrome; such a deviation must be treated. Now you know how to calculate ovulation if your cycle is not regular. Any other methods in this case may give a false result.
How to calculate ovulation online
Replies