Locked twins.
D000328:Adult; D000367:Age Factors; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007746:Labor Presentation; D008297:Male; D007744:Obstetric Labor Complications / Q000453:epidemiology / Q000209:etiology / Q000628:therapy; D011247:Pregnancy; D013019:South Africa; D014427:Twins