Definition: A class of natural contraceptive methods in which SEXUAL ABSTINENCE is practiced a few days before and after the estimated day of ovulation, during the fertile phase. Methods for determining the fertile period or OVULATION DETECTION are based on various physiological indicators, such as circulating hormones, changes in cervical mucus (CERVIX MUCUS), and the basal body temperature.
Other names Periodic Abstinence; Natural Family Planning; Family Planning, Natural; Abstinence, Periodic; Symptothermal Method of Family Planning; Rhythm Method of Family Planning, Temperature; Rhythm Method of Family Planning, Cervical Mucus; Rhythm Method of Family Planning, Calendar; Rhythm Method of Family Planning
