The second twin.
D001034:Apgar Score; D001724:Birth Weight; D036861:Delivery, Obstetric; D005260:Female; D005313:Fetal Death / Q000453:epidemiology; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D010808:Physical Examination; D011247:Pregnancy; D011379:Prognosis; D012189:Retrospective Studies; D014427:Twins