One way to plan a family is to prevent pregnancy by using a calendar. This method begins with the fact that a woman must calculate the expected day of ovulation and refrain from sexual intercourse on days, the most suitable days for conception. These days are called the fertility period and are seven days before the onset of ovulation, as well as the day after it.
The method of protecting the calendar is one of the most reliable "contraceptives". There are many other ways by which you can prevent the appearance of pregnancy, but natural methods are safer. Spermatozoa can live in the vagina for a couple of hours, and in the cervix they can "stretch" for about three days, sometimes a week. After leaving the ovary for 24 hours, the egg can be fertilized.
For correct protection from pregnancy on a calendar it is necessary to consider a cycle of monthly twelve months. But for women with irregular menstruation this method does not work.
How to calculate the prevention of pregnancy by calendar?
For a correct calculation of the days in which you can become pregnant, there is a certain formula:
- The fertile period is equal to the duration of the shortest cycle, minus eighteen days.
- The end of the fertile period is equal to the duration of the shortest cycle, minus eleven days.
For example, according to observations over the twelve cycles, the shortest for the whole year is 26 days. The longest cycle is thirty-two days. So, the most favorable days for conceiving a child are the days of the cycle from the eighth to the twenty-first. Therefore, in order to protect from fertilization, it is better to stay away from sex or use condoms and other methods of contraception. From 21 days and from the first to the eighth the number can not be protected.
Natural Pregnancy Prevention
To date, natural methods of protection are the most safe for women's health, as a result of which they are quite popular. But with such protection there are shortcomings, because of which such methods are not possible for some couples.
Natural protection has many advantages:
- safety for health;
- absence of side effects;
- involvement in the process of both spouses;
- improving family relationships;
- lack of financial costs.
By the way, more accurate ovulation can be determined with the help of the symptomatic method. This method is an observation of changes in rectal temperature, as well as the consistency of cervical mucus.