title: Main findings of the comparative study of social and biological effects on perinatal mortality.
mesh_terms: D001724:Birth Weight; D036861:Delivery, Obstetric; D003710:Demography; D005260:Female; D005313:Fetal Death / Q000453:epidemiology / Q000209:etiology; D005865:Gestational Age; D006801:Humans; D007086:Illegitimacy; D007226:Infant Mortality / Q000639:trends; D008297:Male; D011247:Pregnancy; D012737:Sex Factors; D012959:Socioeconomic Factors; D014505:Urban Population