Letter: Smoking in pregnancy.
D001724:Birth Weight; D005260:Female; D005313:Fetal Death / Q000209:etiology; D006801:Humans; D007231:Infant, Newborn; D008431:Maternal-Fetal Exchange; D011247:Pregnancy; D012907:Smoking / Q000150:complications*; D012959:Socioeconomic Factors