Ovulation is the point in the menstrual cycle when an egg is released from the ovary and can be fertilised. This typically happens once in each cycle and marks the most fertile time for conception. The fertile window includes the days leading up to ovulation and the day ovulation occurs, as sperm can survive in the reproductive tract for several days.

Understanding when ovulation is likely to happen can help individuals and couples time intercourse more effectively when trying to conceive. While cycle length can vary from person to person, tracking ovulation and recognising fertile days is often the first step in understanding reproductive health.

Estimate your ovulation day and fertile window

Use this simple Ovulation calculator to estimate your ovulation day and fertile window. It is based on the first day of your last period and your average cycle length.

Please enter a valid date and cycle length.
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