Related Experiment Video
Updated: Jun 3, 2026

Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
Published on: September 5, 2011
Cord entanglement in monochorionic monoamniotic twins
S Eserdag1, E Zulfikaroglu, A Ozer
1Department of Obstetrics and Gynecology, Ankara Dr. Zekai Tahir Burak Women Health Teaching and Research Hospital, Ankara, Turkey.
Monochorionic monoamniotic twin gestations have been associated with perinatal mortality rates as high as 28% to 47%. Umbilical cord entanglements and knots, twin-to-twin transfusion syndrome, congenital anomalies, prematurity and intertwin locking during labor are responsible for their high perinatal morbidity and mortality. We report here two cases of cord entanglements: One of them was associated with twin-to-twin transfusion syndrome with gross vascular anastomoses and a massive cord entanglement. The other one was associated with cesarean section due to dystocia of cord entanglement of the second fetus after vaginal birth of the first one. There is still no consensus in literature for the management and the mode of delivery of these rarely encountered cases (Fig. 3, Ref. 13).
Monochorionic monoamniotic twin gestations have been associated with perinatal mortality rates as high as 28% to 47%. Umbilical cord entanglements and knots, twin-to-twin transfusion syndrome, congenital anomalies, prematurity and intertwin locking during labor are responsible for their high perinatal morbidity and mortality. We report here two cases of cord entanglements: One of them was associated with twin-to-twin transfusion syndrome with gross vascular anastomoses and a massive cord entanglement. The other one was associated with cesarean section due to dystocia of cord entanglement of the second fetus after vaginal birth of the first one. There is still no consensus in literature for the management and the mode of delivery of these rarely encountered cases (Fig. 3, Ref. 13).
Related Concept Videos
Attachment of Sister Chromatids
Nondisjunction
Nondisjunction
Crossing Over
The homologous pairs of sister chromosomes—one from the maternal and one from the paternal genome—then begin to align alongside each other lengthwise, matching corresponding DNA positions in a process called synapsis.
In order to...
Crossing Over
The Spinal Cord
