Effect of breast-feeding patterns on human birth intervals.
D000568:Amenorrhea / Q000209:etiology; D001721:Birth Intervals; D001942:Breast Feeding; D003267:Contraception / Q000379:methods; D003906:Developing Countries; D005260:Female; D005298:Fertility; D006801:Humans; D007223:Infant; D007225:Infant Food; D007231:Infant, Newborn; D009748:Nutrition Disorders / Q000150:complications; D010060:Ovulation; D049590:Postpartum Period; D011247:Pregnancy