Dangerous days for pregnancy after a month: a table, calculation methods

Conception may not happen any time after unprotected intercourse. Dangerous days for pregnancy after a month come at a time when ready to fertilize the egg is released from the ruptured follicle. Then, it becomes available to merge with the sperm. These few days and are considered the most favorable in the menstrual cycle to the onset of pregnancy.

Many couples use the method of calculation of days for possible fertilization, when planning a child, or, conversely, as a means of contraception. But here there are some nuances, and you need to know about them.

Menstrual cycle

There are three phase of the menstrual cycle. About 5 days at the beginning of the cycle each month go spotting. In a healthy organism the middle period of ovulation. Under the influence of the dominant at the time of the hormone progesterone in the ovary burst follicle and mature egg is released from it into the uterine cavity. It is now considered the most suitable for conception.

During this period, lining of the uterus is altered, ready at any moment to the implantation of the ovum. Dangerous time lasts 2-3 days. After that, if there was no fertilization of the egg, the third phase. In the body is dominated by the hormone estrogen, and the uterus prepares to deprive the female germ cells with a functional layer of the endometrium. A few days later after ovulation begin monthly.

Thus dangerous day are calculated differently in women with short and long menstrual cycles.

Dangerous days for conception

Dangerous days after menstruation is easy to calculate the condition that regular menstruation in women, and can confidently say how many days they last. This method of contraception is not suitable for frequent changes in the cycle.

For this we need to study the calendar of critical days for the last six months, and preferably for a year. Onset of menstruation is considered the first day of the cycle. the shortest and longest periods is necessary to clarify among the data. Then, subtract 18 from the first digit, and the second - 11.

Assume that the shortest cycle turned estimated 24 days and the longest - 30. We obtain: 24 - 18 = 6, 30 - 11 = 19. It turns out that a high probability of becoming pregnant is saved with the 6 th to 19 th day after the beginning of menstruation.

It is believed that the recurrence in the 28 days after ovulation occurs 14 days from the start of menstruation. Accuracy is 2 days before and after that date. Phase lasts only a couple of days, and then the unfertilized egg dies.

Using different methods for determining favorable for conception periods must be taken into account that:

1. Sperm cells can survive inside a woman's body about three or four days after ejaculation. Therefore, after unprotected sex in the last days before ovulation, a woman's risk of getting pregnant.
2. In this type of contraception is not excluded ectopic pregnancy.
3. On the basis of stress, hormonal failure or due to irregular sexual life at a monthly cycle in the ovary can mature more than one egg.
4. Pregnancy does not depend only on whether unprotected sexual intercourse during ovulation. The importance of achieving a certain thickness endometrium. If the layer lining of the uterus has grown less than 7 mm, the fertilized egg can not simply be attached to the walls of the body and leaves the body through the blood discharge.
5. With this disease, as the steep-sided channel of the uterus, sperm can not penetrate to the mature female reproductive cell.
6. If you often have trouble monthly such calculations are meaningless.

All methods for determination of dangerous or favorable time for conception will be effective provided that the woman is healthy and does not have any abnormalities of the reproductive system.

Methods for calculating safe days

In order to determine ovulation, women have long used a variety of techniques. Some use them to avoid sexual contact or take action after unprotected sex, while others use them to want to get pregnant as soon as possible.

The calendar method

This method is effective if the woman strictly following the menstruation, and they come quite stable.

Below is a table showing the dates when the most likely pregnancy for women with a menstrual cycle of 28 days.

The table shows what time of the month egg is ready for fertilization, and when the sperm can not reach the goal. This method has its pros and cons.

Pros:

• easy to calculate;
• no side effects;
• no need to spend money on expensive means of contraception.

Minuses:

• suitable only for those who have a stable cycle;
• there is a risk of contracting sexually transmitted diseases;
• you must carefully monitor and record the arrival of menstruation and ovulation.

Cervical Mucus Method

Lining of the uterus, or rather her cervical canal, during the month produces a different consistency cervical secretion that performs certain functions.

The method is based on the properties of the selected change consistency. After a month they are thick and sticky, preventing sperm move up the genital tract of women. And the secret to ovulation becomes liquid and transparent, according to him the male sex cells are easy to reach the goal, and fertilization takes place.

One day before the release of the egg the amount the transparent mucus increases. Drainage material flows all the time, suitable for pregnancy. After 3 days after isolation again become viscous and begins to monthly safe period for unprotected sex.

The main disadvantage of this method is that it is visually difficult to assess the consistency of the emissions. Especially, they can change as a result of an illness.

Measurement of basal body temperature

Method of measurement basal body temperature It can be used with a regular partner, provided regular sexual life. To plot their own ovulation, it is necessary for 3-4 months every morning before getting out of bed, a thermometer to measure the temperature in the rectum. The use of a mercury thermometer will give more accurate results.

Upon the occurrence of a favorable time for conception thermometer will not 36.6 ° C and 37 ° C or even slightly higher. Such a change in the organism occurs during ovulation. After conception basal temperature remains at this level, with the onset of menstruation comes back to normal.

Ovulation test

The easiest-to-use tool that allows to determine the time for safe sex after a month, a pharmacy ovulation test. Such studies are recommended to carry out every day before the intended release of the egg in the uterus. On the eve of sharply increased levels of the hormone, which captures the test. It is usually used the girls who want to become pregnant, likely to find favorable for this event period.

It is considered the most accurate reusable electronic ovulation testSo be sure to check with detailed instructions for its use.