Velamentous insertion of the cord is associated with an increased risk for: (DNB Dec 2010)
|A||Premature rupture of the membranes|
|B||Fetal exsanguinations before labor|
|C||Torsion of the umbilical cord|
Fetal exsanguinations before labor
a. With velamentous insertion of the cord, the umbilical vessels separate in the membranes at a distance from the placental margin, which they reach surrounded only by amnion.
b. It occurs in about 1% of singleton gestations but is quite common in multiple pregnancies.
c. Fetal malformations are more common with velamentous insertion the umbilical cord. When fetal vessels cross the internal us (vasa previa), rupture of membranes may be accompanied by rupture of a fetal vessel, leading to fetal exsanguination.
d. An increased risk of premature rupture of membranes and of torsion of the umbilical cord has not been described in association with velamentous insertion of the cord.