[Monoamniotic twin pregnancy with knotted umbilical cords].

Monoamniotic twins and true knots of the umbilical cord have a rare occurrence, their coincidence, however, is frequent by more than a half of the observations. There is a case report. The complication could be recognized by cardiotocographic control of the fetuses and both viable children had been delivered by a well-timed cesarean section. It is demanded a premature diagnosis of the twin pregnancy by ultrasonographics B-mode with evidence of the membranes, greatest care to surveillance of out-patient and hospitalized pregnant women, cardiotocographic control of the twins sub partu and generous indication for cesarean section.