The rhythm method works by calculating when ovulation occurs and avoiding intercourse during that most fertile time. Ovulation can be calculated by counting days, basal body temperature, and checking the consistency of the cervical mucus. It is a good method only if your religious/personal beliefs prevent you from taking more effective, hormonal forms of birth control. It is less effective if you have irregular cycles or find it difficult for you and your partner to refrain from intercourse several days each month. This is for partners who are not worried about getting pregnant. You should consult a physician for specific guidelines to monitor ovulation.
