Risks

Using the cervical mucus method to promote fertility doesn't pose any risks.

Likewise, using the cervical mucus method for birth control doesn't pose any direct risks, but it doesn't offer protection from sexually transmitted infections. In addition, the risk of unintended pregnancy with the cervical mucus method is somewhat higher than with other methods of birth control.

It's estimated that as many as 23 out of 100 women practicing the cervical mucus method for birth control will get pregnant in the first year of typical use. With perfect use, the pregnancy rate may be as low as 3 out of 100 women a year.

Formal training is usually needed to master the cervical mucus method. You'll also need to make sure you check cervical secretions every day and keep track of changes. In addition, abstinence — or use of another type of contraception — is typically needed for 14 to 17 days each cycle.