A member asked:

How does an ovulation calendar work?

A doctor has provided 1 answer
Dr. Heidi Fowler answered

Specializes in Psychiatry

Ovulation calendar: Most women ovulate between 11 to 21 days after the first day of the last menstrual period. The actual ovulation phase is about 24 to 48 hours. Depending on the length of your period – an ovulation predictor chart shows you which days you are most likely to be fertile.

Answered 5/28/2013

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