The fertile days of a woman depend on her cycle and the duration of it.
If a woman has a stable cycle (28-day cycle), she can find her ovulation day 14 days before her next period (1st day is considered the Day 1 of menstruation) and the fertile days are 2 days before the expected ovulation and two days later.
However, in order to help you calculate your fertile days, our computer system is here to give you all the answers you need or even better….desire