Dangerous days for pregnancy after menstruation (calculate online): flying days

To be able to independently calculate the time favorable for conception is necessary for all women of childbearing age, regardless of whether they are preparing soon for motherhood or not yet ready to start child. The use of a physiological (calendar) method of contraception does not give one hundred percent guarantee that conception will not occur, even during the period of the closed fertile window. All days after menstruation are considered potentially dangerous for the onset of an unwanted pregnancy. Why we will consider this in this article.

Features of the menstrual cycle

In order to calculate the suitable days for conception, every woman needs to understand what processes occur every month in the uterus and appendages. The first day of the last menstruation is the beginning of the cycle, it ends with the beginning of the next critical days and is divided into three stages:

Follicular phase

It begins on the first day of the last menstruation and lasts an average of 14 days (normally from 7 to 21, depending on the duration of the cycle). Already on the first day of bleeding in the ovaries, follicles begin to ripen. One of them eventually becomes the largest (dominant), displacing the rest. An egg matures in it, which this month will be ready for fertilization.

Ovulatory phase

Comes on 12-14 days with a standard cycle duration of 28 days and lasts from 24 to 48 hours. The mature egg leaves the follicular cavity, heading for the fallopian tube. Here it is picked up by the ciliary epithelium, which helps the gamete to reach the uterine cavity, where, in case of fertilization, it will penetrate into the wall of the genital organ.

Luteal phase

In place of the dominant follicle, which ruptured and released an egg from itself, a corpus luteum is formed, which produces progesterone. If conception has occurred, the hormone contributes to the full implantation of the ovum into the uterine wall and the successful continuation of gestation. In the absence of pregnancy, the corpus luteum undergoes atrophy, the next menstruation begins.

Ovulation is the process of release of a mature egg into the fallopian tube, where it waits for a meeting with a sperm for 1-2 days.

This moment is the most successful for the onset of pregnancy. The term for the maturation of the egg depends on the hormonal background and the average duration of the cycle in a particular woman.

Methods for calculating the dangerous time for conception on your own

During pregnancy planning, you must independently learn how to calculate the days of the cycle suitable for conception, but in order to correctly determine the duration of each cycle, you should keep a calendar, mark in it the dates of the beginning of menstruation and their duration.

There are three types of cycle, depending on the intervals in days between periods:

• short - is 21-23;
• standard - lasts 28 days from the first day of menstruation until the next;
• long - up to 35.

A prerequisite for clearly calculating the onset of ovulation is the stability of the menstrual cycle. If menstruation comes every time after different time intervals, you should not rely on this method of calculation.

With a standard cycle lasting 28 days, the ovulatory phase begins on days 13-14, and the fertility window (a period favorable for fertilization) falls on days 10-15 of the cycle.

The calendar method is a way to independently calculate the time dangerous for fertilization.

To correctly calculate favorable days for conception after menstruation, you should record the duration of the cycle and menstruation in the calendar for six months. Next, you need to select the shortest cycle and subtract 18 from it (22-18 = 4), subtract 11 from the longest cycle (30-11 = 19). It turns out that the period of fertility for this woman begins from 4 to 19 cyclical days. It is at this time that the chances of getting pregnant are highest.

Another way to count the days of flight in the period before or immediately after the end of menstruation is suitable for women with a stable cycle. You just need to divide the cycle time by two (2).

28/2 = 14, 30/2 = 15 - ovulation falls on the 14th or 15th day, and 4 more days before the moment the egg leaves the follicle are dangerous. This method is not suitable for girls with a short and long cycle, since the luteal phase almost always lasts two weeks, and the duration of the follicular phase can vary.

Trying to count the period favorable for pregnancy, you can focus on the data in the table - it shows the average timing of the onset of ovulation for women with different cycle times.

Cycle duration in days	Dangerous days for conception
21	3–10
22	4–11
23	5–12
24	6–13
25	7–14
26	8–15
27	9–16
28	10–17
29	11–18
30	12–19
31	13–20
32	14–21
33	15–22

The calendar method is not suitable in a situation when:

• the cycle constantly deviates from the norm by 3-4 days;
• a woman has recently suffered severe stress, eats unbalanced, tortures herself with excessive physical exertion;
• after delivery or termination of pregnancy, no more than 12 months have passed;
• the girl smokes, abuses alcohol, takes potent drugs that change the hormonal background;
• there is a chronic infection in the pelvic organs.

When compiling a calendar of a safe period, it is necessary to take into account the viability of a particular man's sperm.

On average, a sperm can live in the uterus for 2-3 days, but some, especially tenacious individuals, can remain viable for 5-7 days in a row. Therefore, even if the dangerous time, according to the woman, has not yet come, the chance of pregnancy with surviving sperm increases dramatically.

Basal temperature measurement

Calculating the safe days of the menstrual cycle, so as not to get pregnant, allows the method of measuring the basal temperature. It is measured with a special thermometer in the rectum every morning, immediately after waking up, but without getting out of bed.

It is recommended to record the results in a notebook or notebook. Tracking the thermometer readings for several months, you can see that in the first days of menstruation, the temperature will be around 36.2–36.4 ° C. A few days before ovulation, the thermometer will give out 0.4 ° C less, and on the date of egg release, the indicators will sharply increase by 1-1.5 ° C.

If, from the time of ovulation onwards, as the date of the expected period approaches, the thermometer will show a basal temperature of 37-37.3 ° C, this indicates the onset of pregnancy. A decrease in thermometer marks after the ovulatory phase indicates that the egg has not been fertilized.

Cervical mucus method

Cervical fluid (mucus) is a secret necessary to facilitate the passage of sperm through the cervix into the uterine cavity and maintain their viability. If the mucus does not have the necessary characteristics (too thick and viscous), sperm may die without waiting for fusion with the gamete.

The cervical mucus method is based on tracking the ovulatory phase. During the period of release of the egg from the follicle, the secret begins to separate intensively - it is thick, does not smell, unclear, whitish. It looks like egg white.

It is not recommended to use the method separately from the calendar one and measuring the basal temperature. Only when all three methods are combined is it possible to better calculate the dangerous and safe days for pregnancy.

Determination of the ovulation period in women with an unstable cycle

The fair sex, whose cycle is not stable, can be offered a choice of several methods for determining the fertile window:

1. The use of tests to determine the ovulatory phase of the cycle. They work similarly to pregnancy tests, but the result is based on a response to a different hormone. As you approach the ovulatory phase, the test will produce an increasingly brighter second strip. On the day of ovulation itself, the device will show two red bars.
2. Ultrasound control. The gynecologist can see on the monitor the size of the follicles, whether the dominant one stands out, whether the cervix has smoothed out, whether the corpus luteum has formed (which indicates the release of the egg into the uterine cavity).
3. Self-determination of the days of ovulation.

When compiling a calendar of safe and dangerous days of the menstrual cycle, women are advised to simultaneously focus on their own feelings and body signals about impending ovulation.

Signs of the onset of the fertile window are as follows:

1. Increased sexual desire - thanks to hormones released before ovulation, a woman feels energetic and attractive, the frequency of intimate contacts increases.
2. Soreness in the lower abdomen - caused by rupture of the main follicle. Not very strong discomfort can be observed throughout the suprapubic region or on the side from which the mature gamete emerged from the ovary.
3. Swelling of the mammary glands - the breasts become larger and more sensitive.
4. The release of an abundant amount of cloudy whitish fluid from the vagina - speaks of the opening of the cervix to facilitate the entry of spermatozoa into the genital organ.

Many women do not feel any signs of impending ovulation, therefore, in case of an unstable cycle, it is recommended use more reliable methods to determine the dangerous time - ovulation tests, BT measurement and ultrasound the control.

The likelihood of pregnancy during safe days

The chance of getting pregnant right after your period is small, but it increases every day you approach ovulation. To calculate the risk, one should take into account not only the time of release of the gamete from the follicle, but also the life span of spermatozoa.

Since spermatozoa can survive in an acidic environment for up to 1–4 days, they are not fertile for 2–3, but up to 10 days in the middle of the cycle - they are the most favorable in terms of pregnancy.

For couples who do not plan to have a child, from 9 to 20 days (with a standard cycle duration of 28 days) it is recommended to use spermicides, condoms during this period, or to refrain from intimate contacts.

Immediately after menstruation, conception is unlikely to occur, as the egg takes time to mature and prepare to fuse with the sperm.

But there are exceptions when pregnancy occurs even on unfavorable days. The reasons for this may be the following:

1. Long periods and a shortened cycle. Ovulation occurs on the 8-10th day, that is, intercourse immediately after a long seven-day menstruation, will lead to conception.
2. Hormonal imbalance. Failure causes early maturation of the egg.

If the sexual partner is healthy, the viability of his sperm is increased, the chances of getting pregnant on safe days are significantly increased.

With the help of modern applications that can be installed on your phone or computer, you can easily calculate online when you can get pregnant after your period ends. To do this, it is enough to enter data on the duration of the cycle and critical days, the date of the last menstruation, and the program itself will calculate the results about the favorable and safe for fertilization days.

The programs allow you to calculate for free the time at which you will be able to conceive a child of a certain gender, as well as adjust the calculator for yourself. In the electronic calendar, you can record daily sensations (pain in the lower abdomen, swelling of the chest, etc.), view history, scroll through the graph for several months back and forth. The calculation will be made on the basis of the entered data, which can be changed monthly.

Pregnancy during your period or immediately after

Is it possible to get pregnant after menstruation or during them? Many pregnant women claim that they conceived during their period.

Even if a woman managed to calculate on what days she can get pregnant after menstruation, this does not guarantee that fertilization will not occur immediately after the end of menstruation and even during her.

There are several factors that several times increase the risk of pregnancy during critical days or immediately after them:

1. Short monthly cycle - if a woman has a break between two periods of 21-23 days, the best days for a possible conception of a child may fall from her just for the period immediately after menstruation. Critical days last 6 days, intimate contact took place on the sixth day, and sperm cells have increased viability. As a result, pregnancy can occur on days 10-11, on the first day of the ovulatory phase.
2. Re-ovulation is rare, but naturally occurring cases when two eggs ripen in a woman in one cycle. They can leave the follicles into the cavity of the fallopian tube not simultaneously, but with an interval of up to seven days. If the first egg has not been fertilized, then the second will leave the dominant follicle immediately before or during menstruation. And intercourse during or immediately after your period will lead to pregnancy.
3. Instability of the ovulatory phase - observed with pronounced hormonal disruptions, when the phases change their duration. The risk of pregnancy immediately after menstruation is especially high in women in the postpartum period, when the hormonal background has not fully recovered, when approaching menopause, after surgical interventions on organs small pelvis. Irregularity of menstruation in such situations is the norm until the recovery period ends.
4. Prolonged menstrual bleeding with a shortened cycle.

Doctors warn that even with regular counting of dangerous days of the monthly cycle, the risk of pregnancy at any time still remains.

If you do not want to give birth to a child, it is better, together with a doctor, to choose an effective method of contraception - an intrauterine device, oral contraceptives, condoms, etc. and ensure that the baby is safe in case of pregnancy.

• The calendar method of counting days after menstruation, dangerous in terms of conception, does not show one hundred percent efficiency.
• In women after 35 years of age, 1-3 anovulatory months are observed during the year, when the egg does not mature and does not enter the uterus.

These facts must be taken into account when drawing up an individual schedule of days that are favorable and safe for the onset of pregnancy.