A life table analysis of the relation of prenatal care to prematurity.
D001741:Black or African American; D001724:Birth Weight; D003710:Demography; D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008722:Methods; D009519:New York City; D011247:Pregnancy; D011295:Prenatal Care; D012959:Socioeconomic Factors; D013223:Statistics as Topic; D013997:Time Factors