Ways of contraception: a calendar method of protection from pregnancy

As early as the 1920s, gynecologists, the Japanese Ogini and Austrian Knaus developed a calendar method for preventing pregnancy, based on calculating the approximate date of ovulation and the corresponding abstinence from sexual intercourse on days that are most conducive to conception. Ovulation is the time when the egg, already ripe and ready for fertilization, leaves the follicle. Observant women are always monitored in their bodies for signs and symptoms that accompany the process of ovulation, although they are subjective, but when you compare a couple of times with the exact methods that determine ovulation, a woman will be able to navigate very successfully with their help. It should be noted that as a method protecting against unwanted pregnancy, the method that determines ovulation is not suitable for protection.

Therefore, a more advanced calendar method of protection from pregnancy was developed, called symptomatic method, which, in addition to calculating the date of ovulation, takes into account, among other things, the physiological state of a woman and is based on observations and calculations. Due to minimal interference in the natural processes of the female body, this calendar of calculating ovulation, by the way, became the only method approved by the Roman Catholic Church. The essence of it is that the rate of ovulation is 14 days before the end of the cycle and does not depend on its duration.

By making marks on the calendar about the dates of menstruation and analyzing four to six cycles, the estimated dates of ovulation during such cycles are determined, using a countdown of 14 days from the end date. If the menstrual cycle is 28 days, then with it, ovulation falls on the 14th. The cycle consisting of 26 days has ovulation, respectively, on the 12th day. If the cycle is 32 days, then ovulation occurs on day 18. Thus, counting 14 days from the beginning of the shortest or longest cycles, we learn the time interval in which approximately ovulation should be for a woman for this period.

For a more visual understanding, such an ovulation table will serve. Suppose that 6 regular cycles for the last period of time had a duration of 26, 28, 26, 29, 27, 26 and 29 days. For example, a cycle of 29 days. We calculate: 29-14 = 15. It turns out that ovulation is expected to occur on day 15. Accordingly, 26-14 = 12, this is the shortest cycle, the time of ovulation, respectively, falls on the 12th day. Based on this, this woman can expect ovulation during the 12 to 15 day cycle.

Its calendar of menstruation and a calendar of calculating ovulation is recommended to lead every woman. It must be remembered that during the interval from 12 to 15 days - the time is not yet fertile period. Because before and after ovulation, days are quite favorable for conception. Therefore, women, having information, should take into account that the calendar method of preventing pregnancy - especially unwanted - is very unreliable; It is recommended to use it only for approximate dates of ovulation dates in combination with other, more accurate methods.

So why is the calendar method of preventing pregnancy unreliable? The explanations are very simple. Not always the onset of ovulation occurs 14 days before the end of the cycle. The phase from ovulation to the onset of menstruation can have a duration of 12-16 days and fluctuate within such a framework for the same woman. In addition, quite often there are failures in the hormonal system due to various stresses, relocations, climate changes. All these factors affect the length of the cycle and its changes, there may be unexpected changes, like the delay in menstruation, and its premature onset.

Lovely women, take into account the information received and use it wisely!