A woman is considered to be the most fertile for 5 days within each period cycle: the DDAY (the ovulation day), 3 days prior to the DDAY (DDAY-3, DDAY-2 and DDAY-1) and 1 day after the DDAY (DDAY+1). Fill in the first day of your last period and your cycle length. Click on the 'Calculate' button and you will find out the days you are the most fertile for your next 3 cycles.








Choose your
Baby's Sex
with up to 95%
Success Rate!
dd
mm
year
Enter the first day of your last period:
Enter the length of your menstrual cycle:


Cycle 1
Cycle 2
Cycle 3
Ovulation date:
Fertility starting date:
Fertility ending date:
© 2004 Woman First Limited. Natural Baby Gender Selection Method.