Today, there are many methods for calculating the safe days that are used to determine the most favorable day for conceiving a child. It is important to note that as a method of contraception they are not reliable. These methods work only on condition that your cycle is stable and regular. But, as the experience of doctors shows, the generally accepted norm of the cycle (28 days) is now very rare. Stresses, diseases, fatigue, frequent travel, loads - all this leaves a mark on the cycle of a modern woman.
You can determine safe days for pregnancy using the calendar method, measuring basal temperature, monitoring cervical mucus, etc. Let's consider these methods in more detail.
Calendar method (Ogino-Knauss method)
Several decades ago, world-famous gynecologists Ogino and Knauss discovered a new method for calculating safe and dangerous days for pregnancy. It is based on the fact that a woman can become pregnant only within a few days after ovulation. It is the period of release of the ovum from the ovary that is considered most favorable for the conception of the child.
In practice, this method looks like this: a woman keeps a calendar cycle and calculates the onset of ovulation. Calculations are not complex and are carried out according to the formula. If, for example, the duration of your cycle is 28 days, then the calculation looks like this:
28 - 11 = 17 and 28 - 18 = 10
It is from 10 to 17 day of the menstrual cycle women are the most likely to become pregnant. Remember that the length of the menstrual cycle is the number of days from the first day of menstruation to the first day of the next. If your cycle lasts not 28 days, but, for example, 27 or 31, then simply replace the formula with the number "28".
Only those women can use the calendar method, whose age ranges from 25 to 35 years, and whose menstrual cycle is stable and regular. In addition, if you want to use this method of calculating safe days for pregnancy, then you should not have stresses, colds. Also, the calendar method is not suitable, if you often go on business trips and other trips, change the climate zone. Even if you do not plan a pregnancy and decided to protect yourself with a "calender", still after an unprotected sexual intercourse take additional measures of contraception.
So, the probability of getting pregnant increases immediately after the menstrual period and in the middle of the menstrual cycle. Then the chances of conceiving a child are somewhat reduced until the next menstruation begins. The period of ovulation, when the ovum leaves the ovary, is considered most favorable for pregnancy. However, as doctors say, there are no guarantees for this. You can get pregnant on any day of the menstrual cycle: before, during, and after menstruation.
That's why, along with the calendar, you should also have a diary in which you can record your health, basal temperature. To calculate safe days for pregnancy, a woman should know the length of her menstrual cycles, at least for the last year.
The calendar method does not justify itself, because it involves an ideal regular 28-day menstrual cycle. For various reasons in the modern woman's body, there are "failures" - the cycle is destabilized. Therefore, the degree of reliability of the Ohino-Knauss method is 30-50%.
Basal temperature measurement method
Basal is the temperature that is measured in the rectum every morning, before rising from bed. These data are recorded for at least 3-4 months. Doctors say that in normal at the beginning of the menstrual cycle the basal temperature should not exceed 36, 6-37 degrees. In the period of ovulation, it should decrease to 36, 2-36, 5 degrees, and then steadily keep at elevations above 37 degrees.
All data must be recorded, marked on the graph. In a few months you will notice that every time before the temperature rises, it falls several degrees. Approximately this recession is observed one or two days before ovulation. It is generally believed that you can get pregnant 3-5 days before and after ovulation.
Given this information, women can determine safe days for pregnancy. Their formula has the following form: the serial number of the day of the cycle in which ovulation takes place, +/- 3 days (the average life span of the sperm).
But even accurately made measurements and calculations do not guarantee that the basal temperature method will work completely. And the temperature can rise with diseases, drinking alcoholic beverages, inflammatory processes in the intestines, due to stress and nervous overstrain, overwork. This method is not suitable for women with irregular menstrual cycles. This method is also not suitable if you are taking hormonal medications.
If you still decide to determine safe days for pregnancy with baseline temperature measurements, consult your gynecologist. Together with your doctor, make the appropriate calculations of the chosen method and make sure that they are correct.
Cervical mucus method
In some cases, women use the so-called method of cervical mucus to determine safe days for pregnancy. It is based on changing vaginal discharge during the menstrual cycle.
During the period when ovulation occurs, a woman can observe mucous membranes of watery and transparent discharge. Such a consistency of secretions facilitates the entry of spermatozoa into the uterine cavity. But more dense secretions in a smaller amount indicate that the ovum left the ovary and got into the fallopian tube. This time interval is the most favorable for conceiving a child.
It is believed, that after three days from the beginning of condensation of secretions there come safe days. But the method of cervical mucus has its drawbacks. Firstly, not every woman is able to assess mucus by eye and understand its consistency. Secondly, secretions may indicate the presence of inflammatory processes of female genital organs.
In addition to the above methods, women also define safe days for pregnancy using the simothermal method. This method combines a measurement of basal temperature and monitoring of vaginal discharge.
However, modern women today basically send "on a pension" calendar or basal methods and buy in the nearest pharmacy a special test for ovulation. The work of tests for ovulation, which can be carried out at home, is based on determining the growth in the amount of luteinizing hormone in the urine. For 24-36 hours before ovulation, its concentration increases dramatically. Now this is the most popular, accessible and justified method of calculating pregnancy safe days.