[Twins, triplets and more like that].
Stenmark
U B
UB
D036861:Delivery, Obstetric; D005260:Female; D005313:Fetal Death / Q000517:prevention & control; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D009721:Nurse Midwives; D011247:Pregnancy; D011272:Pregnancy, Multiple; D011644:Puerperal Disorders / Q000209:etiology; D014310:Triplets; D014427:Twins
Tvillingar, trillingar och fler än så.