In family planning, knowledge of the patterns of egg fertilization is essential. The conception calendar allows you to always have an idea of which days the probability of getting pregnant is the highest, and on which it is practically absent.
Knowing the calendar of your own menstrual cycle will most likely allow you to plan the conception of a child, as well as calculate the days when fertilization is least possible. It is best to be able to calculate the period of increased fertility without the help of online calculators.
In order to calculate the conception calendar, you need to know the duration of the entire cycle and the duration of menstruation. A woman should record the start and end dates of her periods for at least six months. Based on this data, it will be possible to get an idea of the average cycle time. The moment of ovulation usually falls in the middle of it. At this time, the mature egg is released from the follicle into the funnel of the fallopian tube.
Fertilization is possible within 24 hours after the rupture of the follicle, in rare cases - within 36. Then the egg cell dies.
As a result of hormonal disruptions and other factors, sometimes ovulation can occur prematurely. Therefore, the period between the end of menstruation and the middle of the cycle is considered favorable for conception. The probability of fertilization at this time is about 33%. But 36 hours after the release of the egg, pregnancy becomes almost impossible until the next ovulation.
The lifespan of sperm is 2-3 days, rarely 5-7. Therefore, conception is possible even if unprotected intercourse occurred a few days before ovulation. Sperm will wait for a mature egg in the fallopian tubes.
The calculation of the ovulatory period is much more difficult in the case of an irregular menstrual cycle. The phase of maturation of the egg - estrogenic - can have a different duration each time. However, the second phase of the cycle, progesterone, cannot exceed 16 days. Therefore, in order to calculate the approximate time of ovulation, it is necessary to subtract 16 days from the duration of each cycle. This method will help you calculate which days the egg is released on average.
Monitoring your own body will help to increase the accuracy of determining the day of ovulation. The most accurate auxiliary method is the observation of basal body temperature. Measurements should be taken every morning for at least six months, strictly at the same time. On the day of ovulation, the temperature drops by about 0.5 degrees, and then returns to its normal value.
You can also learn about the onset of a favorable period for conception by the state of the secreted cervical mucus. Its amount increases and the viscosity decreases. Indirect signs of the onset of the ovulatory period can also serve as an increase in sex drive and pulling pains in the lower abdomen, characteristic of some women.
Using the method of calculating the day of ovulation is not very suitable as an effective method of contraception. The reliability of using the conception calendar to prevent unwanted pregnancies does not exceed 60%. But to increase the likelihood of fertilization with its help, on the contrary, is quite easy.
