From the Centers for Disease Control and Prevention. Impact of multiple births on low birthweight--Massachusetts, 1989-1996.
D000328:Adult; D005260:Female; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D008404:Massachusetts / Q000453:epidemiology; D008423:Maternal Age; D009099:Multiple Birth Offspring / Q000706:statistics & numerical data*; D011247:Pregnancy; D012959:Socioeconomic Factors