Smoking and pregnancy.
D001724:Birth Weight; D005260:Female; D005313:Fetal Death / Q000209:etiology; D006266:Health Education; D006801:Humans; D007226:Infant Mortality; D007231:Infant, Newborn; D008404:Massachusetts; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D012306:Risk; D012737:Sex Factors; D012907:Smoking / Q000150:complications* / Q000453:epidemiology; D000074606:Smoking Prevention; D014481:United States