Twinning in relation to birth weight, mortality, and congenital anomalies.
D000328:Adult; D001724:Birth Weight; D000013:Congenital Abnormalities; D005260:Female; D005313:Fetal Death; D005315:Fetal Diseases; D006801:Humans; D008423:Maternal Age; D010298:Parity; D011247:Pregnancy; D014427:Twins