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Fertility calendar calculator

Enter information about your menstrual cycle to calculate your fertile days

Date of the first day of menstruation (dd.mm.yyyy):
Average length of menstrual cycle:
from 22 to 45, usually 28
days
Average duration of menstruation:
from 2 to 8, often 5
days
For how many cycles to calculate:
Ovulation is a process, when a mature egg is released from the ovary, pushed down the fallopian tube, where is there among next 48 hours, and is available for fertilization. This is a time, when you have a best chance to getting pregnant.