The dynamics of perinatal mortality. Maternal age, parity and legitimacy.
D004739:England; D005260:Female; D005313:Fetal Death / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D007086:Illegitimacy; D007226:Infant Mortality; D008423:Maternal Age; D010290:Parents; D010298:Parity; D011247:Pregnancy; D014852:Wales