Natural family planningBy Mayo Clinic staff
Natural family planning may be an appealing birth control option if you can't or choose not to use other contraceptives.
Popular types of natural family planning include the rhythm method, the cervical mucus method and the basal body temperature method. You can use these types of natural family planning to predict when you'll ovulate — and when you need to avoid unprotected sex, if you don't want to conceive. Another type of natural family planning is withdrawal, in which the man withdraws his penis from the vagina before ejaculation to prevent pregnancy.
Natural family planning requires motivation, diligence and self-control. Natural family planning isn't as effective as other types of birth control, but it's inexpensive and doesn't have any side effects.