title: Monoamniotic twins.
abstract: Six new cases of monoamniotic twins are reported. All had true knots of the cord, the result being double survival in 5 cases and 11 normal children. The mechanism of twin development is described and monoamniotic twins are placed in accordance with the two theories from the literature. A short review of both the Scandinavian and the world cases is presented.
mesh_terms: D000650:Amnion; D005260:Female; D006801:Humans; D008297:Male; D008423:Maternal Age; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins; D014430:Twins, Monozygotic