Interactive Tool: When Are You Most Fertile?

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If your periods are irregular, this calculator is not a good way to predict your ovulation dates. Do not use this tool to prevent pregnancy.

For more information, see the topics Fertility Awareness, Pregnancy, and Fertility Problems. If you are looking for information on birth control, see the topic Birth Control.

Source: Stanford JB, et al. (2002). Timing intercourse to achieve pregnancy: Current evidence. Obstetrics and Gynecology, 100(6): 1333–1341.

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Author:	Sandy Jocoy, RN	Last Updated: October 31, 2008
Medical Review:	Sarah Marshall, MD - Family Medicine Kirtly Jones, MD - Obstetrics and Gynecology
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