Twin pregnancy, complications and treatment.
D000293:Adolescent; D000349:Africa; D001724:Birth Weight; D001827:Body Height; D002648:Child; D004562:Electrocardiography; D005060:Europe; D005260:Female; D005313:Fetal Death / Q000453:epidemiology; D005865:Gestational Age; D006801:Humans; D007226:Infant Mortality; D008297:Male; D009656:North America; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000453:epidemiology / Q000401:mortality / Q000503:physiopathology / Q000628:therapy*; D011859:Radiography; D012146:Rest; D014427:Twins; D014463:Ultrasonography