title: Components of period fertility in the Irish Republic, 1962--77.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001723:Birth Rate; D003267:Contraception; D005260:Female; D005298:Fertility; D006801:Humans; D008393:Marriage; D008875:Middle Aged; D009660:Northern Ireland