Probability of getting pregnant immediately after menstruation


The most favorable days for conception and further successful pregnancy - after menstruation. Everyone who actively plans pregnancy and those who are trying to avoid it for now know this. But “after the menstruation” is still about three weeks, and every day the probability of successful fertilization is different. What does a woman’s fertility depend on and can you get pregnant right after your period?

Modern living conditions, nutrition, low levels of physical activity do not add health to women, but, on the contrary, lead to various functional disorders, including in the sexual sphere. Therefore, the classical calendar method, based on an ideal cycle, can hardly be used today. Its effectiveness is comparable with folk remedies. How to understand your body, and when the probability of pregnancy is maximum?

Why is it easier to get pregnant after menstruation

The work of the ovaries and uterus is closely related to the structures of the brain - the pituitary and hypothalamus. Cyclic secretion of hormones stimulates the growth and maturation of follicles, ovulation, and further provides changes in the endometrium that are necessary for the development of the ovum in case of pregnancy. And if conception on the eve of menstruation or during them is a rarity (not more than 10% of all conceptions), then the time after menstruation is the most favorable period for this.

From the first day of menstruation, under the influence of FSH of the pituitary gland, the dominant follicle with an egg cell begins to grow rapidly in the ovary. Normally, it should be only one. The whole process takes about one to two weeks, after which the peak of hormone release ensures the rupture of the follicle and the release of the egg. This is the optimal time for conception, after which atrophic processes begin in the endometrium and ovary if conception does not occur. If there is a pregnancy, special transformations begin, the purpose of which is the full development of the ovum.

What is the most favorable week after menstruation?

Knowing when pregnancy after menstruation can occur with a high probability, a woman can purposefully try to conceive or save her body from such changes.

Many girls, thinking about how many days after menstruation can become pregnant, the time immediately after the completion of bleeding is considered safe. However, in some cases, the rule does not work. Namely:

  • with an irregular cycle - ovulation is difficult to calculate, it can be either earlier or later than usual,
  • with a short cycle - in this case, the maturation of the egg occurs earlier than on day 14,
  • with long-term spotting - in some cases the periods go up to 10 days, approaching the time of ovulation, for example, if there is a helix in the uterus or a woman suffers from endometriosis,
  • with double ovulation - the phenomenon is not frequent, but possible, especially under severe stress, climate change and even a sharp change in the weather, in this case, the first ovulation may occur immediately after the menstrual period.

If a couple thinks about how to quickly become pregnant, it is necessary to attempt to plan exactly seven to ten days after the menstruation - after the end of the bleeding. In 85% of cases, ovulation occurs on days 10-16, and taking into account the persistence of spermatozoa (they remain active for four to five days), these parameters can still be shifted in both directions.

The closer to the end of the cycle, the lower the chances of pregnancy. Fertilization can occur only in casuistic cases - with double or late ovulation, irregular cycle.

How to calculate fertile days

In order to understand what the probability of getting pregnant after menstruation is in a particular woman in this cycle, you can use several methods.

  • By well-being. As we approach ovulation, sexual desire increases. The woman becomes softer and more docile, the partner attracts her more than usual. This is a “natural mechanism” aimed at increasing the likelihood of intimate relationships and conception these days.
  • By the nature of vaginal discharge. On the eve of ovulation in a woman, vaginal discharge resembles egg white. They are watery, abundant, transparent. Such their character contributes to the advancement of sperm into the uterus.
  • According to basal temperature. More often when planning, but in order to protect themselves, many women also build a basal temperature chart (measured in the rectum in the morning every day). A slight decline and the next rise is a sign that ovulation is occurring these days. Theoretically, there can be two such rises in the table that a woman makes up if more than one egg matures in a cycle. According to the schedule, it is also possible to determine later whether a pregnancy has occurred or not.
  • By tests for ovulation. There are a large number of test strips, made like those used to determine pregnancy. But they are sensitive to another hormone - they react to the peak of the release of LH. To determine ovulation, it is necessary to conduct a test every two to three days. The appearance of two strips foreshadow ovulation.
  • The classic calendar way. In order to most accurately calculate the unfavorable and favorable days, it is recommended to observe the cycle duration for at least one year. Then you should take the shortest duration and subtract 18, and the longest - 11. For example, 21-18 = 3 and 35-11 = 24. The figures show the days most successful for conception. In the example, this is from the third to the 24th day of the cycle. On the Internet, you can find a lot of calculators that automatically enter “dangerous and safe” days when entering monthly dates. There are also special programs for phones, tablets that show the days on the calendar and the probability of conception in them.

When and how can you learn about the fact of conception

One can find out whether a pregnancy develops after the end of menstruation or not, not earlier than two weeks after fertilization. This fact will most surely be confirmed only after the delay of the next critical days. Therefore, you should not run to the gynecologist or on the pelvic ultrasound earlier, there is no point in conducting research.

Methods to help find out if there is a pregnancy or not.

  • Basal temperature. A persistent temperature increase in the pelvis above 37 ° C is one of the symptoms of the functioning of the corpus luteum and the ovum.
  • Definition of hCG. HCG begins to stand out immediately after conception. Gradually, the concentration increases, the amount of it becomes significant even in the urine. However, at 10-14 days after fertilization, the usual pregnancy test will be negative, but the determination of hCG in the blood will already show positive values.

Also, do not forget about what symptoms of pregnancy are known after a delay in menstruation. This is weakness, fatigue, drowsiness, nausea, engorgement of the mammary glands.

How to protect yourself

It is not enough to know whether it is possible to become pregnant after menstruation, it is necessary to select reliable methods of protection for “dangerous” days or, on the contrary, to actively plan pregnancy.

The recommended methods of protection, according to doctors, are the following:

  • surgical sterilization,
  • intrauterine device,
  • hormonal contraceptives (pills, spirals, vaginal rings),
  • condom.

Recommendations for those planning a child

Tips for couples who are actively planning a pregnancy are as follows:

  • calculate the day of ovulation
  • have sex every three days,
  • take both folic acid (for women under 12 weeks of gestation),
  • in the absence of pregnancy during the year should seek medical help.

There is no unequivocal answer from doctors to the question of how to get pregnant after menstruation and on what day sexual intercourse will be productive. There are only many assumptions that in practice do not always find proof. But even based on existing knowledge, you can increase the likelihood of conception or, conversely, avoid unwanted pregnancy.

Myths and reality about pregnancy

Half a century ago, the “calendar” method of protection was perhaps the most common. Many probably remember that “there was no sex in Soviet Russia”, so high-quality contraceptives were practically inaccessible for the majority. And doctors in one voice assured that the probability of getting pregnant immediately after menstruation is minimal. So the ladies calculated on the pocket calendar those “happy” days when they could fearlessly bestow their second half.

And since abortion was also not very welcomed at that time, thanks to the “calendar” method and its disruptions, the country's population steadily increased. Because pregnancy occurred not only among those women who prepared for the magical event in advance, but also among those who did not expect such a gift of fate at all!

Interestingly, despite all the examples, many women still seriously believe that on certain days the risk is minimized - it is usually considered that the safe period starts 3 days before the beginning of the month, continues during the menstruation and 3 more days after .

But let's note right away: the minimum and zero opportunity are different things, because no one can guarantee that a certain woman at any particular moment will not fall into that same “happy” percentage for which the probability of getting pregnant after menstruation will turn into reality!

In terms of physiology

The low probability that it will be possible to start a new life in the first days after menstruation is related to the physiology of the woman.

The menstrual cycle consists of four phases. The longest is the follicular, usually it lasts two weeks (plus or minus 4 days), at this time in the female body that very dominant follicle, which contains an ovum ready for fertilization, matures.

The ovulatory phase is characterized by the fact that the egg cell is fully mature and ready for fertilization. She is waiting only for the appearance of sperm - and this period lasts from about 12 to 17 days. Everything, of course, is very individual, but it is during this period of time, which is called the "fertile window", the probability of pregnancy becoming greatest.

The uterus of the woman begins to intensively prepare to receive the embryo of the future life, the so-called luteal phase. At this time, the egg is still not gone anywhere, and although the hormonal background of the body has already qualitatively changed, conception is still quite possible.

If this does not happen, a kind of purification takes place at the end of the cycle - the menstruation itself, which, in fact, is the final phase of desquamation. In this case, the endometrial layer is separated and excreted from the body along with the unfertilized egg cell.

For conception, this moment is extremely unfavorable, a kind of aggressive hormonal background prevents pregnancy, even with unprotected contact. And it continues a few days after the discharge ends. That is why the question of how likely to become pregnant immediately after menstruation, many doctors answer the categorical "no."

There are no rules without exceptions.

Women, trying to know the joy of motherhood, carefully calculate the days for the very purpose of getting pregnant - but for some reason this fails. The fact is that even during ovulation, the chances of successful fertilization of the egg and the fact that it will "take root" in the uterus do not exceed 30%. Against this background, the likelihood of pregnancy in the “safe” period seems to be quite illusory - something around 1-2%. But this is a small chance for those who are eager for motherhood, and for those who are forced to protect themselves is a very frightening percentile.

The fact is that in some women, due to some hormonal features, the menstrual cycle is not definitively established. Therefore, the moment of ovulation can shift, respectively, and conditionally safe days will not be fixed either. Therefore, in the event that the monthly may come not by the calendar, but with a shift of 5-7 days, you should be skeptical about the "calendar" method of protection. These women have a question - what is the probability of getting pregnant immediately after their periods? - The percentage of positive responses is growing exponentially.

The second common reason is a too short menstrual cycle. The fact is that all phase calculations are based on a standard cycle, which is usually 28-29 days. But in reality it happens that it lasts less than 25 days, while the menstruation itself takes not 3-4, but 7-8 days, and sometimes more. It turns out that the dangerous period comes not on the 12th day, but somewhere on the 8th. It turns out that menstruation has just ended (or still reminds of itself with bloody secretions!), And the egg has already matured and is ready for fertilization.

And if we take into account that many women during menstruation, sexual desire sharply worsens, sexual intercourse at this time can be not only spontaneous, but also extremely passionate. What are the chances of getting pregnant after menstruation in this situation? I have to admit that it is very, very great!

"Resort" pregnancy

Any failure of the menstrual cycle is a hormonal jump in a woman’s body. What can he be called? Yes, a million reasons - taking medication or some kind of disease, unhealthy diet or increased physical activity. But most often the cause is a variety of stress, which in modern conditions torment us almost constantly.

Moreover, it should be noted that joyful excitements can lead to a cycle failure. For example, those related to going on vacation. As a result, after a luxurious holiday, an unexpected pregnancy can easily occur somewhere on the seashore. And this provided that unprotected sex was exclusively in the "safe" period! So on vacation it is best not to trust only this method alone, but to use additionally some other method of contraception.

Sustainable "little friends" may surprise

But suppose that a woman’s cycle is “correct” and never goes astray. Is it possible to trust the “calendar” method for one hundred percent, and what is the probability of becoming pregnant after menstruation in this case? Alas, nothing changes - a small chance remains all the same.

In this case, it all depends on the partner - in some sperm are sluggish and unviable, while in others they can boast of increased survivability. In some cases, spermatozoa, in anticipation of a mature egg, can retain their “fighting” qualities for a whole week, being in the genital tract all this time.

In fact, the fertilization process will occur, as expected, during the "fertile window", but the woman will think that it happened much earlier - because unprotected sex was a week ago!

In life there is always a place for unpredictable accidents.

There are quite rare cases when a woman has 2 eggs mature at one cycle at different times. This is called spontaneous ovulation. In fact, such women can become pregnant at any time, even during menstruation. Nobody can explain why this happens, but doctors assume a certain genetic predisposition. So the question whether there is a chance of getting pregnant after menstruation should be answered in the affirmative by all women who have had such cases in their families.

Sometimes it seems that pregnancy occurred on "safe" days after menstruation. In fact, everything happened a lot earlier, as it should be, at the time of ovulation. The egg cell was fertilized and attached in the uterus. But for some reason, part of the epithelium is still separated, creating the illusion of a full menstruation. A woman has sex after her graduation - and after a while she learns that she will be a mother. And, of course, the “calendar” method fails.

In general, women who want to 100% exclude the possibility of pregnancy should not count the days in anxiety and eternal stress, and use another method of contraception. After all, the possibilities of medicine have leaped forward in the last 50 years!

Long periods

If the menstruation is too long, when the regulation is observed for more than a week, after the discharge, it is possible that the maturation process of the new egg has already ended, and it is ready for fertilization. Accordingly, there is a risk of becoming pregnant on the 6th day after menstruation and even earlier.

The duration of the cycle also affects the chances of conception. A period of 28–30 days is considered the norm, but for most women of reproductive age, the time frame is much shorter (22–26 days).

If the cycle is short and varies from 18 to 21 days, then there is a shift in the phase of ovulation to the beginning of menstruation. In this case, after the end of menstruation in the first days you can get pregnant, but only if the functioning of the ovaries is not disturbed.

Learn how to correctly count the duration of the cycle from our additional article on the site.

Irregular cycle

Шансы оплодотворения сразу по завершении месячных зависят от регулярности менструального цикла. Обусловлено это тем, что выход гаметы из фолликула происходит в разные дни, и узнать точную дату овуляции невозможно. Поэтому при нерегулярных месячных можно забеременеть на 4-й день после критических дней.

Early ovulation

Ovulatory time is considered conditional. Sometimes it starts much earlier than expected and is caused by a short cycle. At the same time, menstruation lasts for 3–7 days, and ovulation occurs within one and a half weeks from the moment they start. Accordingly, this process will be observed only a few days after the cessation of blood discharge.

Maturation of eggs in two ovaries is capable of causing such changes.

In one of the organs, the follicle matures and bursts in due time, causing the production of sex hormones, resulting in menstruation. In another, the life of an egg cell begins, and as soon as it matures, ovulation occurs and the possibility of conception occurs.

Pregnancy a week after menstruation

Many women are interested in whether it is possible to become pregnant within a week after the end of menstruation. This largely depends on the female cycle and hormone levels. As a rule, ovulation occurs on the 13th day after the arrival of the monthlybut these frames are often expanded and are within 10–17 days. This process may start too soon or be delayed. Often these changes are due to the use of drugs and the individual characteristics of the body.

With early onset of ovulation there is a risk of getting pregnant on the 7th day of the menstruation cycle. During this period, conception is possible even if the man’s spermatozoa are too tenacious. Even if intimacy was a week before ovulation, fertilization will occur. To control these processes is very difficult.

The likelihood of such changes is the same as with a regular, and with a broken cycle. Conception can occur in any of its phases. That is why doctors recommend resorting to the use of more reliable methods of contraception.

In more detail about what day you can get pregnant after menstruation, tell our separate article on the site.

Calendar method of contraception

The calendar method of protection is quite popular and seems to many to be the simplest, most reliable and safe. In fact, it does not suit everyone and does not give a one hundred percent guarantee.

The method of determining safe and fertile days helps to prevent unwanted pregnancy. At the same time, it is necessary to exclude intimacy during the period of time when there is a risk of successful fertilization. On all other days during intercourse, you can not use means for protection.

In order to use this method of contraception, you need to know exactly how to maintain a calendar. It is necessary to identify dangerous days in which the probability of conception is as great as possible. To this end, it is necessary to make scrupulous calculations, and on their basis to display the appropriate records.

Monthly after the end of the monthly need to mark the days of the beginning of the cycle. Such observations should be made throughout the whole year.

From the first months it will not be possible to use this method, since the risks of getting pregnant after menstruation will be quite large. In addition, the results must be constantly adjusted.

Thus, if the cycle duration varies within 27–33 days, then the first of favorable days for conception will be the ninth after the onset of menstruation, and the last - the 22nd. During this period, intimacy is completely excluded or contraceptives are used.

Advantages of the calendar method:

  • you do not need to take oral contraceptives and hormonal drugs that can affect the state of health,
  • no financial costs.

The disadvantages of this method of preventing pregnancy are the following:

  • The method is effective only with a regular cycle. At the slightest violations and failures, conception is possible immediately after menstruation and on the second day,
  • there is no protection against sexually transmitted diseases,
  • contraceptive effect is rather low. The probability of fertilization even on the 3rd day is not excluded,
  • constant monitoring of cycle changes.

The calendar method is allowed to use only in cases where an unplanned pregnancy does not become a serious problem for partners. There is no absolute guarantee that conception will not occur on the 5th day of the cycle or on any other phase of it.

What is the probability of getting pregnant on unfavorable days?

The probability of pregnancy immediately after the completion of critical days is relatively low. Previously, it was generally believed that this was impossible, but such cases did occur. There was a belief that the gamete is not yet ripe at this point and does not come out of the follicle, but it has already been proven that the egg can be ready for fertilization even on the first day after menstruation.

Chance to get pregnant after menstruation increases under certain circumstances:

  • spontaneous release of a ripe egg from the follicle immediately after the start of a new cycle (on the 1-3th day),
  • the stay of spermatozoa in active state in the fallopian tubes for a long time.

Even if the proximity between partners was before critical days, the sperm cell remains viable for about a week and is able to fertilize it immediately after the release of the egg. As a result, pregnancy begins in the period of menstruation or after their completion.

If we talk about the probability of conception after 5-7 days after menstruation, then it increases significantly and reaches 90%, especially in cases where women have a short menstrual cycle.

Male factor

It is not recommended to trust the calendar method of contraception even when a regular cycle has been established and there are no failures in it. The risk of becoming pregnant is in this case, which is due to the male factor. In some representatives of the stronger sex, sperm cells are unviable and very sluggish, while in others they are active and tenacious. They can be in the body of a woman from the moment of inception to the fertilization of the egg.

Spermatozoa remain active for up to seven days if they are in the genital tract. Therefore, many women assume that conception did not occur on dangerous days, but at another time, despite the fact that sex was a whole week before.

The probability of getting pregnant after menstruation is in every woman, regardless of the characteristics of her reproductive system. This is influenced by many factors that cannot be controlled. For this reason, the calendar method of protection has recently lost its popularity.