How ovulation is calculated?
Ovulation is typically calculated based on the length of a woman's menstrual cycle.
The menstrual cycle starts on the first day of a woman's period and ends on the day before her next period. Ovulation usually occurs about halfway through the menstrual cycle, or around day 14 in a 28-day cycle. However, the timing of ovulation can vary from woman to woman and can even vary from cycle to cycle in the same woman.
Let's say a woman has a menstrual cycle that lasts 30 days. To estimate when she will ovulate, you would subtract 14 days from the length of her cycle. This is because ovulation usually occurs about 14 days before the start of her next period.
So in this case, 30 minus 14 equals 16. This means that the woman is likely to ovulate around day 16 of her cycle. So we add 16 to the first date of her last period. If she had a period on 1st april then this will be 1+16 = 17th april. and esimated fartile window will be (17-5)=12 to 17 th april.
However, it's important to note that this is just an estimate, and the actual timing of ovulation can vary from woman to woman and even from cycle to cycle in the same woman. To more accurately predict ovulation, the woman could also use methods such as basal body temperature charting, ovulation predictor kits, or cervical mucus monitoring, as I mentioned in my previous answer.