title: A study of premature births.
mesh_terms: D000293:Adolescent; D000328:Adult; D001724:Birth Weight; D005260:Female; D006801:Humans; D007194:India; D007231:Infant, Newborn; D008423:Maternal Age; D008429:Maternal Welfare; D007752:Obstetric Labor, Premature / Q000453:epidemiology* / Q000209:etiology; D010298:Parity; D011247:Pregnancy; D012907:Smoking / Q000150:complications