From the Centers for Disease Control. Pregnancy risks determined from birth certificate data--United States, 1989.
D000328:Adult; D001719:Birth Certificates; D036861:Delivery, Obstetric / Q000379:methods / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008875:Middle Aged; D011247:Pregnancy; D011256:Pregnancy Outcome / Q000453:epidemiology* / Q000208:ethnology; D011295:Prenatal Care / Q000706:statistics & numerical data; D012307:Risk Factors; D012309:Risk-Taking; D012907:Smoking / Q000009:adverse effects / Q000453:epidemiology; D014481:United States / Q000453:epidemiology; D015430:Weight Gain