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ovulation calculator
The iVillage UK Ovulation Calculator
Don't leave it all to chance if you really want to get pregnant. Find out when you're most likely to be ovulating and increase your chances of conceiving.

Tell us the day you last started menstruating and how long your cycle usually lasts, and we'll tell you when you're most likely to be fertile over the next 24 months, as well as your approximate due date if you do conceive on one of those days.

create my fertility calendar
Step 1: enter your date
Find out your most fertile days by entering the first day of your last menstrual cycle:
  

Step 2: enter the days of your cycle
Fertilisation usually takes place 14 days before your next period. If your menstrual cycle is longer or shorter than 28 days, enter the length of your cycle (the number of days from the start of one menstrual cycle to the next).

NOTE: This tool provides approximate dates only and works best for women with a regular menstrual cycle. If your menstrual cycles are irregular, you may have trouble determining your day of ovulation based on the ovulation calculator alone. In that case, you should try monitoring your basal body temperature and cervical mucus. Find out more about your fertility.

Already pregnant? Track the progress of your pregnany with our interactive calendar