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The ovulation calculator helps you estimate your most fertile days based on the first day of your last period and your average cycle length. By knowing when you are likely to ovulate, you can better plan intercourse to improve the chances of natural conception. This tool gives an approximate fertile window and ovulation date, but every woman’s cycle is different, so it should be used as a guide and not a replacement for medical advice.
Estimate your fertile window by entering the first day of your last period and your average cycle length.