Role of bed rest in twin gestation.
D001513:Beds; D005314:Embryonic and Fetal Development; D005260:Female; D005313:Fetal Death / Q000453:epidemiology / Q000517:prevention & control; D005865:Gestational Age; D006760:Hospitalization; D006801:Humans; D008423:Maternal Age; D007752:Obstetric Labor, Premature / Q000517:prevention & control; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology; D011272:Pregnancy, Multiple; D012146:Rest; D014427:Twins