Absolute security is what days?

Women have when it comes to security period, ovulation is measured from the next instance of the first 14 days of after 5 days and 4 days before, however, according to the specific circumstances of each person, possible ovulation in ovulation or two in advance. Ovulation in advance will normally be a few days in advance, as regards the period of ovulation is the second time in a safe method which in a few days?

Also, is not to say, clean the first or second day after menstruation, and two days before the day before the next menstruation, or even three days before the period of May is not considered to be absolute security or step back and say, clean, as well as on the first day of menstruation is absolute security on the previous day of the next menstrual period.

Ordinarily women dropped outside the ovulation, menstrual cycle phase remaining days known as security. Ovulation but because many factors may or delayed for a few days in advance, so security is divided into absolute and relative, absolute security changes to the date of ovulation period relates to the fact that absolute security days too. Because ovulation date change no more than 3 days before and after General, menstruation (say 3 days) a week before and after should be absolutely safe, and menstruation close day more secure.