title: Trends in illegitimacy among five English-speaking populations: 1940-1980.
mesh_terms: D000293:Adolescent; D000328:Adult; D001315:Australia; D001723:Birth Rate; D002170:Canada; D005260:Female; D006801:Humans; D007086:Illegitimacy / Q000639:trends*; D007231:Infant, Newborn; D008297:Male; D008423:Maternal Age; D011247:Pregnancy; D012939:Social Planning; D006113:United Kingdom; D014481:United States