Velamentous cord insertion Velamentous cord insertion Velamentous cord insertion is an abnormal condition during pregnancy. Normally, the umbilical cord inserts into the middle of the placenta as it develops. In velamentous cord insertion, the umbilical cord inserts into the fetal membranes (choriamniotic membranes), then travels within the membranes to the placenta (between the amnion and the chorion). The exposed vessels are not protected by Wharton's jelly and hence are vulnerable to rupture. Rupture is especially likely if the vessels are near the cervix, in which case they may rupture in early labor, likely resulting in a stillbirth. This is a serious condition called
Umbilical cord prolapse or those where there is only one fetus. In twin pregnancies, cord prolapses occur more frequently in the second twin to be delivered, with 9% in the first twin and 14% in the second twin. Umbilical cord prolapse Umbilical cord prolapse is when, during labor, the umbilical cord comes out of the uterus with or before the presenting part of the baby. The concern with cord prolapse is that pressure on the cord from the baby will compromising blood flow to the baby. The greatest risk factor is having had more than two previous children with the current baby in