title: A study of risks, medical care, and infant mortality. 1. Selected substantive results.
mesh_terms: D001741:Black or African American; D001034:Apgar Score; D001722:Birth Order; D001724:Birth Weight; D000013:Congenital Abnormalities / Q000453:epidemiology; D003695:Delivery of Health Care; D003710:Demography; D004522:Educational Status; D005006:Ethnicity; D005260:Female; D005865:Gestational Age; D006761:Hospitals / Q000706:statistics & numerical data; D006801:Humans; D007086:Illegitimacy; D007226:Infant Mortality; D007231:Infant, Newborn; D008423:Maternal Age; D009519:New York City; D009774:Obstetrics; D011247:Pregnancy; D011248:Pregnancy Complications; D011295:Prenatal Care; D011647:Puerto Rico; D011996:Records; D012959:Socioeconomic Factors