10K views · 198 reactions | Did you know the moon cycle and the...

The cycle duration is always calculated from the first day of the period to the next periods first day including the first day of both the cycles. So this is called as cycle duration. Why is it important to know the monthly cycle length? It is very important, because you can probably determine when you will ovulate and then you can try during that fertile period for a pregnancy or you could avoid an intercourse if you are trying to avoid a pregnancy during that fertile period. On an average most