The sociobiological aspects of the national survey on fecundity and fertility in Belgium.
D000328:Adult; D001530:Belgium; D001723:Birth Rate; D003273:Contraceptive Devices / Q000706:statistics & numerical data; D005260:Female; D005298:Fertility; D006801:Humans; D007247:Infertility, Female; D007248:Infertility, Male; D008297:Male; D011159:Population Surveillance; D012924:Social Conditions