Demographic effects of variations in post-partum amenorrhea and fetal wastage on fertility.
D000022:Abortion, Spontaneous; D000293:Adolescent; D000328:Adult; D000568:Amenorrhea; D001723:Birth Rate; D005260:Female; D005298:Fertility; D005313:Fetal Death; D006801:Humans; D007774:Lactation; D008954:Models, Biological; D011247:Pregnancy