Table of dangerous and safe days for conception, calculator


What are the most dangerous days for pregnancy when conception may occur? Every educated woman knows that she can not conceive every day. It is only possible to get pregnant in the days of ovulation, when an egg is “born” in the ovary. There is no egg before and after this event, which means there can be no baby. However, in this case, different nuances are possible. Let's talk about dangerous days for pregnancy, the accuracy of their calculation, and why women, even those who know their physiology well, are still unplanned to become pregnant.

So, the female menstrual cycle is divided into three phases. The first begins with the next critical days. In the first days of the cycle, 5-7 days, as a rule, bleeding is observed. The dominant follicle in the ovary is determined, and hormonal changes occur, due to which it breaks, and an ovum, ready for fertilization, enters the internal genital organs. This process is called ovulation. This is the second, ovulation phase of the cycle, falls approximately in the middle of the cycle.

Immediately after ovulation, a corpus luteum appears in the ovary, which begins to produce the hormone progesterone. Endometrium is transformed, it becomes favorable for the implantation of the egg. And if egg fertilization occurs, and it only exists for a maximum of 48 hours, and more often 24 hours, then the progesterone level remains high. This is expressed by tenderness of the mammary glands, as a rule. If conception did not happen, then shortly before the onset of menstruation, the level of progesterone decreases. And these hormonal changes provoke endometrial detachment and the beginning of a new menstrual cycle.

Is it possible to get pregnant immediately after menstruation, suppose on the seventh day of the cycle? Ovulation can not happen so early. However, spermatozoa tend not to die in the female genital tract for up to three days. Therefore, there is a small probability of pregnancy, if a woman has a shortened menstrual cycle, its duration is less than the average. Just over 20 days.

Well, according to most women, after menstruation days, dangerous for pregnancy begin at about the tenth. And end 2 days after ovulation. Thus, in order to avoid unwanted conception, without using the means of contraception recommended by medicine, you just need to learn to calculate or determine ovulation. Ovulation has some pretty noticeable symptoms.

1. Abundant, mucous discharge from the vagina, which "stretch." Similar to egg white. Often they are found on toilet paper.

2. Minor bleeding, stabbing pain in the ovary. Prick in the ovary begins immediately at the “birth” of the egg. Well, bleeding is a small detachment of the endometrium that occurs in response to a temporary decrease in hormones. It happens not all. Often go unnoticed due to the small amount.

3. Increased libido. Sexual desire is top notch. This can be explained by a certain natural pattern. This ensures the best fertility.

4. Increase in basal temperature. Its measurement is best carried out in the rectum. Surely in the morning, without getting out of bed and not making unnecessary movements. In general, in order to create your conception calendar, that is, calculate online the days are dangerous and safe for pregnancy, it is enough to enter the start date of the last menstruation and indicate the duration of the cycle. But, having made the schedule of change of the basal temperature, it is possible to receive even more exact data.

So, just before ovulation, a few hours before it, the temperature drops slightly, and immediately after it rises to 37 degrees and higher. At the same time, it remains elevated practically until the beginning of the next menstruation. And in the case of pregnancy does not decrease.

However, no calculation of dangerous days for pregnancy or otherwise safe days of the cycle does not give 100% guarantees of accuracy. Often, calculations and subjective feelings turn out to be erroneous, and unwanted pregnancy occurs. It will be more correct and effective to use contraception approved by doctors.

The calendar allows you to calculate online days dangerous for pregnancy:

Pregnancy planning calendar

Planning a pregnancy is impossible to imagine without basic knowledge of the menstrual cycle. The latter consists of several successive stages or phases, each of them has its own characteristics. The main task of each of these phases is to prepare the female body for the upcoming conception. If the menstrual cycle is irregular, the female reproductive function is significantly reduced.

The pregnancy planning calendar allows women to quite easily navigate when another ovulation occurs - the most favorable period for conceiving a child. Entering the calendar of the beginning of the month, you can quite simply calculate the favorable time for conceiving a baby.

You can keep a calendar in different ways. The most obvious of them - graphic. In this case, the woman draws the dates in the calendar with different felt-tip pens or colored pens. As a rule, for convenience, the favorable for conception period is highlighted in green, and inappropriate days (first of all, monthly periods themselves) are red or black.

Maintain a pregnancy planning calendar should be quite carefully and responsibly. Any mistakes and inaccuracies that are made may cause the calculation of subsequent ovulation to be incorrect.

For the accuracy of the calendar, you should keep it for several months - in this case it is easier to understand the individual tendency of ovulation, and you can correctly calculate the safe and dangerous days for conceiving a baby.

Favorable period for conception

The best days to conceive, which are easier to get pregnant, are the days immediately before and after ovulation. The highest probability of pregnancy falls on the day of ovulation itself - at this time the egg cell is already ripe and ready to meet with the sperm.

Ovulation with a regular menstrual cycle occurs approximately in its middle. It should be noted that this is not the case in all cases, because ovulation is an extremely individual process. If the cycles are irregular or even anovulatory (without maturation of the follicle), it is almost impossible to calculate the exact date of onset of ovulation.

The table that follows shows the safest days for conception on the example of the 28-day and 32-day menstrual cycles.

The duration of the menstrual cycle


Favorable days

Such a simple method of calculating days safe for conceiving is called calendar or mathematical. To perform it is quite simple, knowing the duration of the menstrual cycle. If the cycle is irregular, then the calculation is quite often with errors.

If the cycle is violated, the ovulation date is constantly shifting. In such situations, doctors recommend that women use other methods to determine the date of ovulation.

An often used alternative way of planning favorable days for conception is to determine ovulation by measuring basal temperature. To measure this figure should be in the morning, and even better to do it, while in bed. All obtained measurements must be recorded in a notebook or notebook - it will simply not forget them, as well as track the dynamics of changes.

The first half of the menstrual cycle is characterized, as a rule, by fluctuations in basal body temperature from 36.6 to 36.8 degrees Celsius. During ovulation, the indicator can reach a value of 37 degrees. Then the peak temperature decreases. Determining the basal body temperature will help determine the approximation of ovulation, and hence the onset of a favorable period for conceiving a child.

In some cases, especially with a number of comorbidities, measuring basal body temperature is not a reliable way to determine ovulation. This means that in such a situation, such a test should not be applied.

Ovulation can also be determined using:

  • appearance of vaginal mucus and additional clinical symptoms (pain in the projection of the ovaries, breast enlargement and swelling),
  • ready-made ovulation tests (similar to pregnancy tests) that can be done at home,
  • carrying out folliculometry (ultrasound of the ovaries).

Each method has its advantages and disadvantages. It should be noted that the admission of errors and inaccuracies is also possible, and in all ways. Many women in order to most accurately calculate the date of ovulation and safe days for conceiving a baby, use several methods at once.

Adverse Conception Period

In addition to favorable days for conceiving a baby, there are also dangerous during the menstrual cycle. At this time, the possibility of fertilization of the egg is significantly reduced. Doctors believe that the unfavorable days for conception are the period of menstruation itself (“monthly”), as well as several days before and after it. In order to understand why this is all happening, again, you should turn to biology.

During menstruation, the inner cellular layer of the uterus (endometrium) begins to reject. This feature is physiological and indicates a normal course of the menstrual cycle. At this time, the inner lining of the walls of the uterus is quite soft and loose. It is rather difficult to attach to such an egg surface, that is, the possibility of embryo implantation is rather low.

With each successive day after menstruation, the inner cell layer in the uterus begins to recover. In such a situation, the possibility of attaching a fertilized egg to the uterine wall is already increasing.

Immediately it is worth noting that menstruation is an unfavorable period for planning conception, however, the possibility of pregnancy at this time still exists. Such situations are found in gynecological practice quite often. Women who often have a pregnancy in the last days of their periods and immediately after them often turn to gynecologists.

The development of such a situation may be due to several reasons. First of all, these are features of the female body. The presence of diseases of the female genital organs or dyshormonal disorders contribute to "unplanned" ovulation. In this case, ovulation occurs earlier. A ripe egg cell is already ready to meet with the spermatozoon, and, despite the unprepared endometrium, such a meeting can still occur. In this case, there may be difficulties with the implantation of the embryo, but the onset of pregnancy is still possible.

Less favorable days for conception are also 3-4 days before and after the onset of menstruation. The table below shows most unfavorable days for planning conception during the 28-day and 32-day menstrual cycle.

The duration of the menstrual cycle

Dangerous days for conception

At this time, the probability of pregnancy is significantly reduced, but still exists. The possibility of conceiving a baby in such a situation is due to the following factors.

  • Short duration of the menstrual cycle. So, if it lasts less than 6 days, then during unprotected intercourse during the menstruation period, the onset of pregnancy is possible. This is due to the possibility of sperm to persist in the female genital tract for several days.
  • Irregular sexuality. In this case, during sexual intercourse, a lot of sex hormones are released into the woman’s blood, which can provoke "spontaneous" ovulation. In this case, the egg can also be fertilized.
  • Crash of the menstrual cycle. With an irregular and confused cycle, it is very difficult to accurately calculate on what day ovulation will occur. In this case, the possibility of the release of the egg during the start of the menstrual cycle also exists. A variety of causes can lead to failures in the ovaries - from banal stress to serious pathologies of internal organs.

Interactive calculation method

It is also possible to calculate the favorable time for conceiving a baby through an online calculator. This simple method allows you to define dangerous and safe days when planning a pregnancy.

Using a calculator is quite convenient. To do this, you only need to enter the duration of the menstrual cycle and the date of the last menstruation. After a couple of seconds, the result will be ready. The work of any calculator for determining safe and dangerous days for conception is based on the calendar method of calculation.

On what days are most favorable for conception, see below.