The Probability of Getting Pregnant After a Month

According to the calendar method of contraception, is named after its discoverers, Ogino, Clauss, female menstrual cycle is divided into three intervals:

    Perfect sterility
    Partial sterility (there is a chance to get pregnant),
    Most fertile.

Period of partial sterility begins on the last day of menstruation and continues until ovulation. Ovulation begins after 14 days from the beginning of the cycle (first day of menstruation), but more often at the eleventh, twelfth or thirteenth day. In this case you need to know that if the menstrual cycle consists of 28 days, ovulation may be, from the eighth and twenty days.

Sterility period begins on the day of ovulation and runs for two days after ovulation.

The period of greatest opportunity to become pregnant - six - eight days (five days shall be added in case the spermatozoa are in the uterine mucus and still viable) The period of complete sterility comes after two days after ovulation and lasts until the end of menstruation. In order to determine its period of greatest opportunity to become pregnant should be no fewer than six menstrual cycles to calculate their length. During this period, you should use other methods of contraception. Then you can determine your fertile period for the duration set forth below formula:

The number of days in the longest of the cycles should be deducted eleven - the last fertile day is obtained by the cycle. After that, the number of days in the shortest cycle, subtract eighteen - are obtained by first fertile day of the cycle. The most objective, this method is with regular menstrual cycle, which includes 28 days.
This method of calculating the days with the highest probability of pregnancy has a number of advantages:

-  It is very safe
-  It has no side effects,
-  It does not require cost
-  When using this method, both partners are involved planning pregnancy, which brings them closer.

However, there are some negative aspects:

This method is valid only if the cycle is stable, per year out of a hundred women using this method get pregnant from nine to twenty-five, which is quite a high percentage, should be very clearly meet all the requirements during pregnancy should be possible to indulge in sexual intercourse, must constantly monitor the phase and count the days should not apply to young women, since the change in hormonal levels can capture calculations, chance of becoming pregnant is, and it often hurts women method does not provide an opportunity to protect themselves from sexually transmitted diseases or infections that spread through the bloodstream.