Ovulation Calculator

It takes a little investigation to understand your menstrual cycle. There are several ways to determine when you are fertile: basal body temperatures, cervical mucous, ovulation predictor kits and the calendar method, to name a few. If you have regular cycles, the calendar method is a simple option.

Enter the date of your last menstrual period, and the calculator will reveal when you could be most fertile during the next three months. This tool also tells you when a baby conceived during any of these cycles would be due, and which celebrities and notables could share your baby's birthday!

First Day Of Last Menstrual Cycle*: Month: January February March April May June July August September October November December Day: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Year: 2007 2008 2009 Average Length Of Your Cycle**: Days

Tips:
* The first day of your last menstrual cycle is the day your period begins to flow. Pre-menstruation spotting is not considered the beginning of your period.