Rhythm method for natural family planning

The rhythm method, also called the calendar method or the calendar rhythm method, is a form of natural family planning.

To use the rhythm method, you track your menstrual history to predict when you'll ovulate. This helps you determine when you're most likely to conceive.

If you're hoping to get pregnant, you can use the rhythm method to determine the best days to have sex. Similarly, if you're hoping to avoid pregnancy, you can use the rhythm method to determine which days to avoid unprotected sex.

Using the rhythm method for birth control requires careful record keeping and diligence. If you don't want to conceive, you and your partner must avoid having sex or use a barrier method of contraception during your fertile days each month.

Why it's done Risks How you prepare What you can expect

The rhythm method can be used as a way to promote fertility or as a method of contraception, by helping you gauge the best days to have or avoid unprotected sex. Tracking your menstrual history for either fertility or contraception is inexpensive and doesn't have any side effects. Some women choose to use the rhythm method for religious reasons.

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