International comparisons of perinatal and infant mortality rates.
D004739:England; D005260:Female; D005313:Fetal Death / Q000453:epidemiology*; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007231:Infant, Newborn; D007564:Japan; D011247:Pregnancy; D012923:Social Class; D013548:Sweden; D009626:Terminology as Topic; D014481:United States; D014852:Wales