Duration of lactation, lactational amenorrhoea and incidence of pregnancy in Pakistani women.
D000293:Adolescent; D000328:Adult; D000568:Amenorrhea / Q000209:etiology*; D001942:Breast Feeding; D005260:Female; D005298:Fertility; D006801:Humans; D007774:Lactation; D010154:Pakistan; D049590:Postpartum Period; D011247:Pregnancy; D012424:Rural Population; D013997:Time Factors; D014505:Urban Population