title: Natural family planning: a review.
mesh_terms: D000818:Animals; D001831:Body Temperature; D002582:Cervix Mucus / Q000032:analysis / Q000378:metabolism; D003276:Contraceptives, Oral / Q000627:therapeutic use; D005193:Family Planning Services; D005260:Female; D006801:Humans; D007774:Lactation; D008297:Male; D008593:Menopause; D012252:Natural Family Planning Methods; D010060:Ovulation / Q000187:drug effects; D010061:Ovulation Detection / Q000379:methods; D011247:Pregnancy; D011627:Puberty; D012732:Sex Determination Analysis; D013094:Spermatozoa / Q000502:physiology; D013315:Stress, Psychological; D002575:Uterine Cervicitis / Q000188:drug therapy; D014627:Vaginitis / Q000188:drug therapy
chemical_list: D003276:Contraceptives, Oral