The hazards and management of twin pregnancies.
D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007743:Labor, Obstetric; D011247:Pregnancy; D011248:Pregnancy Complications / Q000517:prevention & control*; D011272:Pregnancy, Multiple; D014427:Twins