First ovulation after childbirth: the effect of breast-feeding.
D000293:Adolescent; D000328:Adult; D001706:Biopsy; D001831:Body Temperature; D001942:Breast Feeding; D002582:Cervix Mucus / Q000166:cytology; D004717:Endometrium / Q000166:cytology; D005260:Female; D006801:Humans; D007774:Lactation; D008598:Menstruation; D010060:Ovulation; D011247:Pregnancy; D011336:Probability; D013997:Time Factors; D014626:Vaginal Smears