title: An unusual case of twin pregnancy.
mesh_terms: D000293:Adolescent; D001724:Birth Weight; D004200:Diseases in Twins; D005260:Female; D005317:Fetal Growth Retardation / Q000209:etiology; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins; D014430:Twins, Monozygotic