Perinatal mortality rates.
D001724:Birth Weight; D005060:Europe; D005260:Female; D005313:Fetal Death / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D005865:Gestational Age; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D011247:Pregnancy; D011248:Pregnancy Complications; D012959:Socioeconomic Factors; D006113:United Kingdom; D014481:United States