On what days can you not get pregnant? How to calculate safe days so as not to get pregnant. How to calculate safe days for sexual intercourse in your cycle

A very important question for many women: How to calculate safe days so as not to get pregnant? The surest way is to calculate manually, not online.

Every woman always tries to know exactly those days that are considered safe for her personally in terms of conception. There are several ways to calculate this, but I want to warn you right away that this is practically not a guarantee.

Only four days a month are considered 100% safe - two days before your period and two days after it. Everything else is relativity! At its core, a woman can become pregnant on absolutely any day except these four, so why then carry out calendar calculations - you ask.

The answer is simple - the probability of getting pregnant on some days is incredibly low, so they can rightfully be considered, if not safe, then certainly the least dangerous.

I would like to immediately clarify one factor - the cycle of a woman who is going to use the calendar calculation of “safe days” must be absolutely stable. So, if you have not used hormonal contraceptives, you need to clearly analyze your cycle over the past year. In this case, it will be easier to calculate safe days so as not to get pregnant.

If during the year there were “failures” in the operation of the cycle, calendar calculations will not bring any benefit. If everything went well, deviations were acceptable (cold or high temperature, seasonal changes in the cycle), then these calculations can begin.

So, let's start calculating safe days to avoid getting pregnant:

We determine the duration of the maximum (longest) cycle, and the minimum (shortest) cycle.

From the number of days that you have in the minimum (shortest) cycle, you need to subtract the number 18 - this will be the very day from which you can “fly” even from a blow of wind.

We subtract the number 11 from the number of days of the maximum (longest) cycle - we get the last day of active protection.

Your interval of days of “active flight” should be 12 days - these are the most dangerous moments when you need to carefully protect yourself.

The question often arises - what is the likelihood of getting pregnant in those same four safe days, because this is often discussed at “women’s gatherings”. There is a high probability in two cases:

If a woman does not have a full sex life, everything happens from case to case - the probability of “catching” an unwanted pregnancy in these four days is very high. This is because with absolutely irregular sexual activity, the body reacts to each sexual act as a signal - “we act urgently and quickly catch what we have given.” Unscheduled ovulation occurs and here it is - something that was not expected happened!

If a couple practices interrupted coitus as a form of protection, this is also quite possible. The substances that make up the partner’s sperm give a signal to the female body and ovulation immediately occurs, and completely unplanned.

Only in the case when sex life is regular and measured, the partner is permanent - the calendar method and the cherished four days will not fail.

Is it possible to get pregnant during menstruation or immediately after it ends?

It is quite rare during menstruation, the reason is that heavy bleeding prevents sperm from rising quite actively into the cervical area and this sperm is “diluted” by bleeding products. This “cocktail” prevents conception in almost one hundred percent of cases.

But the option of getting pregnant immediately after the end of menstruation, in those very cherished two days after it, is quite possible. The sperm, like everything that represents the male principle, is very tenacious. It can continue to be “active” in the female genital tract for another three to five days, which makes it possible, with poor hygiene, to freely become pregnant even after intercourse in the cherished two days. The sperm will wait a little inside the female uterus and do its job!

But such a calendar method cannot be used by all women without restrictions. There are certain factors that throw all calculations down the drain, and you definitely need to know about them:

If you are under 25 years old or over 35, this method will not suit you. At a young age, the cycle is not yet fully formed; it will not be possible to calculate it correctly. But if the age is older, then ovulation can occur quite unplanned and suddenly, especially if the woman has not given birth. The body sounds the alarm about this and quickly “grabs everything on the fly.”

If your cycle is not very regular, there are no special deviations, but there is no stability either. This can happen when a woman has a very stressful job or lives constantly in a state of nervous stress. In this case, the body secretes ovulation as a kind of “sedative”, and can give this medicine when you don’t need it at all.

If a woman has any chronic diseases. In this case, ovulation is not planned at all, but “as God puts it on your soul.”

When a woman has frequent trips, business trips, expeditions in her life. The body does not have time to get used to changes in climate, time zones, biorhythms, even the composition of water. That is why ovulation always occurs spontaneously and unplanned, simply when the body seems that the woman has suddenly “slowed down” for a while.

So the calendar method of calculation doesn’t seem to be bad, but it doesn’t provide much of a guarantee – about 50%, no more. In all other cases, it is best to use contraceptives. In this case, you won’t have to think about how to calculate safe days and not be afraid of getting pregnant!

Every sexually active woman should ask herself: “On what days of the menstrual cycle is it possible to get pregnant?” For some, this is necessary to avoid an interesting situation, while for others, on the contrary, to achieve a much-desired pregnancy. In order to make the most accurate calculations, many schemes and methods have been invented, so let’s take a look at some of them.

The answer to this question is quite simple and may disappoint those women who are looking for a way to avoid various methods of contraception. There are no reliable days of the menstrual cycle in nature. It’s just that on some days the probability of being in an interesting situation increases, and on others it decreases, but there cannot be a completely safe period.

When using a calendar for protection, it is customary to consider the most “reliable” days to be a couple of days on the eve of critical days, and a couple after their end. This method of contraception should be used only if the menstrual cycle is stable. Determine the length of your cycle. On average, it is 28-32 days; accordingly, the possibility of getting pregnant increases during the ovulation period on days 12-16 of the cycle.

This calculation is quite relative, because the processes in the female body are directly dependent on many reasons. This could be stress, illness, hormonal fluctuations, climate change, taking medications, etc.

Calendar of safe days of the menstrual cycle: learning to calculate

This is not an easy task. This requires advance preparation; try to study the nature of your menstrual cycle over several months, or even a year. During this period, methods of preventing unwanted pregnancy using hormonal therapy are excluded. Mark the passage of menstruation and any changes in the cycle in a special menstrual calendar.

If the course of your critical days is irregular, then the likelihood of calculating “safe” days for conception is reduced to zero. It is possible to choose another type of contraceptives.

For those whose menstrual cycle has only minor fluctuations, the calculation is as follows:

  • Over the observed period of time (at least 6 months), identify the two menstrual cycles with the longest and shortest duration.
  • Subtract the number 18 from the short cycle. This will give you the value from which the “dangerous” period will be calculated. Example: 26-18=8.
  • Subtract 11 from the longest cycle. This gives you the upper limit of numbers when you should be careful when making love. Example: 32-11=21.

Based on the example, we see that from days 8 to 21 of the menstrual cycle there is a high probability of pregnancy.

Dangerous days for conception: is it possible to get pregnant on the eve of menstruation?

The vast majority of cases indicate that the percentage of permissible conception of a fetus before menstruation is extremely insignificant. Here's why: when menstruation occurs, along with a layer of uterine tissue cells formed for the successful course of a possible pregnancy, an egg is released along with bloody discharge.

It is during this period of time that difficulties arise in the processes of attachment of the fertilized egg to the walls of the uterus. The hormones of a woman’s reproductive system are preparing for the next cycle, even if ovulation has occurred again, it is unlikely to become pregnant.

But still, in some cases, before the onset of menstruation, some women become pregnant, why is this?

If a woman’s health is fine, but she is not constantly sexually active, then the chance of getting pregnant increases many times over every time she has sex.

Thus, the body responds to an infrequent event, and “unplanned” ovulation occurs. By the time sperm pass through the fallopian tubes, a fully formed egg may be waiting for them.

A similar situation can occur if a woman is constantly sexually active, but her partner ejaculates not in the vagina, but through interrupted sexual intercourse. Substances that make up male lubricant can cause emergency ovulation. This can be avoided if sexual partners have a fairly active sex life over a long period.

Dangerous days for conception: is pregnancy real right after menstruation?

There is an opinion that it is impossible to get pregnant immediately after the end of menstruation, but statistics and medical practice say otherwise.

This is possible for several reasons:

  • Sperm do not lose their viability and are ready to fertilize the egg within a week after penetration into the woman’s genitals.
  • It is often observed that during one menstrual cycle, not one, but several eggs are formed.
  • Not all women of childbearing age can boast of uninterrupted functioning of their body, especially considering the polluted environment and poor lifestyle. From this it turns out that ovulation does not occur strictly in the middle of the cycle; even in healthy women it can shift.
  • Because of this, the safe time period becomes shorter by several days before and after the expected date of ovulation.
  • In young girls, this is due to irregular menstrual cycles. In older women, there is a hormonal imbalance, for example, due to stress.

One thing is certain: contraception using the calendar method is unreliable.

Can menstruation serve as reliable protection against unplanned pregnancy?

It can be assumed that the risk of pregnancy in the early days of menstruation is minimal. At this time, unfavorable conditions are formed for sperm to achieve their goal, as well as for the connection of the egg with the walls of the uterus after its fertilization. The reason for this is sufficient blood secretion.

However, every rule has exceptions. Conditions that provoke “flying up” during critical days:

  • Menstruation lasts for a long time, less than seven days remain before ovulation, then the sperm can remain active in the woman’s genital tract and wait for the arrival of the egg.
  • If the cycle is irregular, and therefore the days for safe sexual intercourse are incorrectly calculated.
  • When a healthy girl’s menstrual cycle is suddenly disrupted due to a number of reasons.

Dangerous days for conception: counting the days with the greatest chance of getting pregnant

In order to accurately determine the days surrounding the conception of a child, some methods are used, tested by medical practice and women's experience.

We measure basal temperature

To do this, starting from the first day of menstrual bleeding, we measure the basal temperature. This is done in the morning at approximately the same hours, immediately after waking up. The most accurate information is provided by measuring basal temperature in the anus rather than in the mouth or vagina.

Some deviations may occur for the following reasons:

  • Increased body temperature.
  • Excessive drinking the night before.
  • Sleep duration is less than six hours.
  • Less than six hours passed between having sex and the measurement process.
  • Taking medications, etc.

Keep a calendar where you will enter the graph and temperature values, filling it out daily. In the first half of the cycle, the temperature generally ranges from 36.6 to 36.9 degrees, and after ovulation it rises to 37 or more. If you carefully study the schedule, you can find out in advance about the onset of your ovulation.

When in the middle of the cycle, somewhere on days 12-16, the temperature drops, this foreshadows the release of an egg from the epididymis, ready for “fusion”.

This is a signal to have sex for women planning a pregnancy and to take care of barrier protection for those who do not want it.

Doing an ovulation test

This method gives a more accurate result and has moved with the times. The algorithm for using an ovulation test is similar to a pregnancy test. The only difference is that the first tests react to a different type of hormone - luteinizing hormone - LH. This hormone is secreted by the female body one or one and a half days before ovulation. Therefore, in order not to miss this event, it is worth doing tests every day at the same time. When ovulation passes, LH levels drop rapidly and the test will show a negative result.

Let's resort to ultrasound examination

The indication to resort to this method is the assumption of possible infertility. It is necessary to conduct an ultrasound starting from the 10th day from the start of the menstrual cycle. The growth of the predominant follicle in the ovary is monitored. Having reached the required size, the follicle opens and releases a ready egg for possible fertilization.

It happens that this process does not lead to ovulation for a number of reasons; it may rupture or worsen.

When the doctor diagnoses the onset of a suitable period for conception, it is up to the sperm, which is necessary to inseminate the egg, and the successful implantation of the embryo.

The nature of the inner layer of the uterus plays an important role so that it acquires the necessary characteristics at the time of ovulation.

This technique is suitable for young ladies who have been wanting to, but cannot, become pregnant for a long time.

Method of individual sensations

Many women experience certain sensations and desires that are unique to them every menstrual cycle. By carefully observing yourself, you can accurately determine your own ovulation. Of course, this method will not provide high guarantees, but the receptivity of a certain number of women allows you to correctly mark the days for future pregnancy.

Here are some of the signs:

  • Mild pain in the area of ​​one ovary or uterus.
  • A sharp jump in sexual desire.
  • Mucous vaginal discharge, more abundant than usual. They do not look like discharge in the presence of infection, are odorless, have a transparent color, and also go away on their own after a few days.

It is worth noting that if any girl has critical days, at least once or twice a year so-called “reboots” occur when she cannot get pregnant. In scientific practice they are called anovulatory cycles. But we hasten to console those who are planning a pregnancy, such periods of rest for the female body occur no more than twice a year.

Know that getting pregnant is an incredibly difficult, but at the same time very simple process, and with effort you can always achieve what you want. And those who want to refrain from its onset should carefully select a contraceptive method and keep a calendar of safe days of the menstrual cycle.

According to statistics, the number of abortions in developed countries of the world is not getting smaller. And in developing countries, this is the most common method of ending pregnancy today, despite the prohibitions and risks associated with possible complications and infertility.

Recently, one can increasingly hear about various safe contraceptive products produced by industry. However Most modern women are increasingly inclined to calculate “safe” days much healthier and more correct than drinking dubious drugs and using condoms made of unsafe latex. Absolutely every woman can create a calendar of safe days.

Menstruation, cycles and phases of their occurrence

In medicine, the days when the female body is ready for ovulation are called the fertile period. With a probability of 85-100%, every first woman who gave birth to a child conceived it during this period of time.

The menstrual cycle consists of three main phases of dangerous and safe days:

  1. The phase when a woman is completely sterile. The countdown starts from the last day of ovulation and ends with the first day of menstruation.
  2. Relative sterility(the possibility of fertilization is 10-15%). This time falls on the period of time from the last menstrual day to the day when ovulation begins.
  3. Fertility. The most favorable time to conceive a baby. These are 2-3 days in the middle of the menstrual cycle, called ovulation days.

Naturally, when using online calculations of the safe days calendar, you must remember that it does not take into account the individual characteristics of each woman’s body. And therefore, at the boundaries between the phases of sterility, relative sterility and ovulation, it is necessary to leave several days in one direction or another. This kind of “reserve” may become another certain precaution for you.

Online safe days calculator

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Calendar of safe days - why can calculation be more useful than dubious drugs?


Calendar and safe days calculator

Calendar calculations of sterile days and family planning methods are associated with the physiological characteristics of most women and scientific observations. Most often, when calculating sterile (safe) days, the phases of the menstrual cycle are taken as a basis.

Calendar method

Keeping a calendar of safe days may require attention and discipline from a woman for some time. This is due to the fact that You will need to keep a diary for several months, in which to record a number of your indicators, and then conduct an analysis based on them. In addition, after 3 months of keeping such a diary, you should definitely consult a doctor.

However, every woman who keeps a calendar must understand that no one can give a 100% guarantee that she will not become pregnant on sterile days. Preliminary calculations only make it possible to determine the fertile period and minimize the likelihood of pregnancy if it is unwanted.

However, the calendar of safe days of the menstrual cycle has a number of undeniable advantages:

  • Calendar calculations can be used both for contraception purposes and if the family has begun planning to conceive a child.
  • This is the only environmentally friendly method of contraception in which there are completely no unwanted side effects on the female body
  • Calculation by the calendar will allow you to better understand a woman’s reproductive system and increase a man’s responsibility for family planning and health.

However, couples experiencing difficulties with the need to abstain during the fertile phase, as well as women who do not have permanent partners, should use this method with extreme caution. The former have a high probability of unwanted conception, the latter are at risk of contracting viral and infectious diseases.

Contraception and conception calculator

Determining the days of contraception is possible using a special online calculator. In order to determine safe days, you need to enter only a few numbers into the appropriate cells - the duration of the entire menstrual cycle, indicating the exact date of its start. The cycle is counted from the first day of the previous menstruation to the first day of the next.

The safe days calculator is ideal if a woman has the same menstrual cycle. In this case, both the favorable day for conceiving a child and sterile days can be calculated with almost 100% accuracy.

Options for determining the necessary indicators for an unstable cycle
How to determine the beginning of menstruation if the cycle is “floating”? In this case, the onset of menstruation is determined by measuring body temperature in the rectum (basal temperature). By taking measurements in the morning while lying in bed, you will notice that on the days of ovulation (middle of the cycle) the readings will increase by 0.2-0.50C.

Another way to correctly determine the indicators that are entered into online tables and calculators is to calculate the days of ovulation from vaginal mucus. In this case, by the middle of the month the mucus becomes transparent, stretchy and slightly thinner than usual.

Doctor Komarovsky: pregnancy planning

For some, conceiving a child is a desired and long-awaited process. Other men and women try by all means to avoid this. On what days can you not get pregnant? This question is asked by couples who use interrupted sexual intercourse or the calendar method of calculation as contraception. The days when you cannot get pregnant will be described in this article. You will find out the opinion of experts on this issue. You can also find out how these most infertile days are calculated.

On what days can you not get pregnant? Doctors answer

If you ask this question to a gynecologist, reproductive specialist or obstetrician, you will not receive a clear and unambiguous answer. In their opinion, days when you cannot get pregnant simply do not exist. Throughout the entire cycle, a woman remains likely to become fertilized. It’s just that on some days it is maximum, while on others it decreases to a minimum. Doctors say: you can never guarantee that pregnancy will not occur during a certain period of the cycle. There is an exception to every rule.

Doctors also note that the female body is very unpredictable. Quite often, due to the influence of external factors, the fairer sex experiences hormonal imbalance. It is because of this that pregnancy can occur when you definitely don’t expect it.

A little theory

To find out on which days you can’t get pregnant, you should have a fairly clear picture of conception. Even at school, teachers tell children about this during biology and anatomy lessons.

Thus, the male body produces seed cells - sperm. They are capable of fertilizing the female body with every sexual contact. That is why men do not have specific days when they can or cannot conceive a child. If a representative of the stronger sex is healthy, he is always fertile, of course, after puberty.

What can you say about a woman? On what days can you definitely not get pregnant? There is only one answer to this question. Pregnancy cannot occur when there is no egg to fertilize. After all, it is the presence of this gamete in the genitals of the fairer sex that leads to fertilization. Without it, pregnancy is simply impossible.

How to calculate safe days so as not to get pregnant?

Finding out which days you can’t get pregnant is quite simple. It is necessary to know exactly the duration of a woman’s menstrual cycle and the stability of these periods. We can talk about regularity when for at least six months the duration of the cycle has not varied by more than 1-2 days. The rupture of the dominant follicle and the release of the egg occurs on average two weeks before the next menstruation. This is precisely the peculiarity of the second phase. It always lasts the same time. While the first half of the period can normally last from seven days to three weeks.

To calculate which days you cannot get pregnant, subtract 10-14 days from the duration of the cycle. The resulting number will be considered the most fertile day. During this period, the gamete ready for fertilization is released. The woman’s body remains in this state for about two more days. After this, the probability of pregnancy gradually decreases and reaches its minimum at the beginning of menstruation.

What can be said about the first half of the menstrual cycle? During this period, sexual contact is quite likely to lead to conception. It is worth remembering that sperm can stay in a woman’s uterus and vagina for about one week. Based on these data, you can make a simple calculation. Remember that a lot depends on the length of the menstrual cycle. So, for women with a period of 21 days in the first half there is no safe time. If the cycle lasts 35 days, then its first 14 days can be called infertile.

Menstruation period

On what days of your period can you not get pregnant? If we take into account the woman’s physiology and the calculation method described above, we can answer this question as follows. The first days of discharge can be called safe. However, this rule only applies to women whose cycle lasts 28 days or more. For representatives of the fairer sex with a short period, even the days of menstruation are dangerous.

There is also an opinion that it is impossible to get pregnant during bleeding. This is explained by the fact that the discharge simply washes away sperm and male gametes from the uterus and vagina. Also during this period, the endometrium is in the most unfavorable condition for implantation. Even if fertilization occurs, the fertilized egg simply will not be able to attach and develop further.

On what days after menstruation can you not get pregnant?

As for menstrual flow, you already know. Let's try to calculate on which days you definitely can't get pregnant in a given case.

  • In a cycle lasting three weeks, safe days can be considered the period from 10 to 21 days.
  • If your cycle lasts four weeks, then the absence of pregnancy is likely if you have intercourse from days 1 to 7 and from 18 to 28.
  • With a long cycle of five weeks, safe days are the first 14 days, as well as the period from 25 to 35 days.

Summing up

Many representatives of the fair sex use the methods described above and try to find out on which days they cannot get pregnant. Calculating the safe period is quite easy. However, no one can guarantee your success.

Women say that misfires still happen. The reason for this may be hormonal imbalance. In this case, the cycle is shortened or lengthened. The ovulation period similarly shifts. Also, the environment for sperm to stay can be quite favorable. In this case, they will remain in the woman’s body for up to ten days. Statistics say that every third representative of the fairer sex who uses this method of contraception ends up pregnant. Protect yourself correctly. Good health to you!

It is quite possible to determine conditionally safe days after menstruation by observing a woman’s menstrual cycle. But this method of contraception does not provide a complete guarantee of preventing pregnancy.

Female cycle and ovulation

The risk of becoming pregnant as a result of unprotected sex occurs at almost any time during the menstrual period. It’s just that some specific part of the cycle is more favorable for conception, and another less so. The greatest chance of getting pregnant occurs in the middle of the cycle - the female reproductive cell matures and leaves the follicle. The menstrual cycle begins on the first day of your period. If the female periodicity is 28 days, then days 11-16 are favorable for fertilization. If the cycle is 30 calendar days, then you can easily get pregnant from days 13 to 18. If the period is too short, then it is possible to conceive a child immediately after menstruation or at its final stage.

To calculate your harmless days, you need to divide the female cycle by 2, and then subtract 2 days from the middle and add 2 days. If the duration of the period is 26 days, then days 1-11 and 15-26 will be non-hazardous. But this is the case if ovulation occurs on time, without delays or advances. Nothing is perfect, so you shouldn’t completely trust the calculation of safe periods of the menstrual cycle. It is more suitable for planning pregnancy rather than preventing it. The fact is that even during menstruation there is some probability of giving birth to a baby. An egg can be released very early or very late, and sperm can live actively in a woman’s body for several days.

The ability to get pregnant decreases in the initial and final days of the cycle. Many women believe that the last 10 days are safe days before their period. But this is confirmed only if ovulation has already passed. In addition, there is a possibility that in one month not 1, but 2 eggs will be released at once. When 2 eggs mature and fertilize in 1 phase, twins are born. If unprotected sexual intercourse occurs before menstruation, but menstruation does not occur, then this indicates conception.

The first 10 days of the cycle can also be considered relatively safe from conception. Fertilization did not occur, the epithelial lining tissue of the uterus was completely renewed and came out with menstrual blood, and the new egg has not yet matured. But you shouldn’t rely completely on these days either. To calculate favorable and unfavorable moments for pregnancy, you need to be confident in the consistency of your cycle.

Usually it is characterized by enviable regularity in women aged 25 to 35 years. During this period of life, a girl experiences hormonal levels that are most favorable for conceiving and bearing a child. In the period from and up to 25 years, as well as at the age of 35 years and older, the cycle may change. Therefore, if you are too young or old enough, you cannot protect yourself with harmless periods of time alone, because they will have little meaning.

Women's health and pregnancy

The regularity of the menstrual cycle is influenced by the woman's health status. This is not just about long-term and severe illnesses. The body is also greatly exhausted by physical and emotional stress, stress, lack of sleep, and adverse weather conditions. There are cases when during hot summer periods a woman’s cycle increases. A sharp change in climate during a vacation or business trip can also provoke the body to rearrange the female cycle.

Ovulation does not always depend on the presence of spotting. The opportunity to have a baby also exists in the first months after childbirth. During this period, the first red discharge after childbirth has not yet appeared, and ovulation may already occur. Thanks to this, you can conceive a child after childbirth before the start of a new menstrual cycle. Breastfeeding your baby does not affect your ability to conceive.

After an abortion, there is also a high chance of getting pregnant. In such a case, ovulation may precede the onset of bleeding, and safe days will be difficult to calculate. Therefore, in the event of an abortion or childbirth, when the cycle was disrupted, you should not rely on harmless days. In such a situation, it is better to use reliable methods of contraception to prevent unwanted conception.

Unreliability of the natural method

A woman's use of her monthly period to prevent unwanted pregnancy is a natural method of contraception. It does not cause such harm to health as the use of hormonal and chemical drugs. But it is not completely harmless or effective. It is possible to accurately calculate favorable days for conception and draw up a schedule for safe unprotected sex only in 80% of cases, and in 20% unexpected conception occurs.

To plan pregnancy or to prevent it, every woman needs to keep a personal calendar in which she must mark the moment of the onset of menstruation. Such actions are usually performed when planning pregnancy, so that ovulation occurs. In circumstances of preventing fertilization, one must start from the opposite. But the success of conception depends not only on a woman’s physiology.

Sperm can live in the body of the fair sex for several days and actively move through the woman’s reproductive tract. Therefore, to calculate harmless days at the beginning of the female cycle, before ovulation, it is necessary to take into account the fact of the vitality of male reproductive cells. In such a case, the duration of the safe period is reduced by 2-3 days. If ovulation is expected on day 11 of the cycle, and unprotected sex occurred on day 9, then sperm can survive 2 days in the woman’s body, wait for the egg to form and fertilize it.

The greatest danger of using days unfavorable for conceiving a child is the high probability of contracting various diseases. Unprotected sexual contact is a prerequisite for the transmission of pathogens from one partner to another. You can enjoy periods safe from conception with a permanent and reliable partner who monitors his health and undergoes regular medical examinations. But unprotected sex on safe days cannot be used with different, unstable partners. In such a situation, there is a risk of not only getting pregnant, but also acquiring various serious illnesses.