How many days that the girl is fertile after their menstruation?
A woman is only fertile for around 30% of her menstrual cycle at most - there is only a phase of around 10 days when a woman can get pregnant, it is biologically impossible to conceive as a result of sex any other time.During an average 28 day menstrual cycle a woman would be fertile from days 7-16 - this includes ovulation on day 14, there may be a viable egg for up to 48 hours, and a week beforehand when fertile quality cervical mucus is present. When a woman is fertile or not depends on her cycle, the only way she would know when she is fertile would be if she was using fertility awareness method.