Interactive Tool: When Are You Most Fertile (cont.)
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What do the results tell me?
Your "fertile window" is up to 6 days long, once a month. It includes:
If you want to become pregnant, try to have sex every day or every other day from your first fertile day to your last fertile day.
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.
Source: Speroff L, Fritz MA (2005). Clinical Gynecologic Endocrinology and Infertility, 7th ed. Philadelphia: Lippincott Williams and Wilkins.
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