Management of Velamentous Umbilical Cord Insertion

Primary Delivery Approach

Vaginal delivery is generally preferred for singleton pregnancies with velamentous umbilical cord insertion without vasa previa, as cesarean delivery is reserved for obstetric indications rather than velamentous insertion alone, according to the European Society of Cardiology 1
The American College of Radiology recommends planned cesarean delivery for twin gestations with velamentous insertion and additional risk factors, as velamentous insertion occurs in up to 22% of monochorionic twins and significantly increases adverse outcomes 2, 3

The American College of Radiology suggests that velamentous insertion with concurrent fetal growth restriction and abnormal Doppler findings is a relative indication for cesarean delivery, with a recommendation to consider cesarean delivery based on the clinical scenario 4
Vaginal delivery can proceed when velamentous insertion is isolated without vasa previa, according to the European Society of Cardiology 1

The American College of Radiology recommends systematic assessment of velamentous cord insertion at the routine second-trimester anatomy scan (18-22 weeks) using transabdominal ultrasound, with color Doppler ultrasound having 67% sensitivity and 100% specificity for detecting velamentous insertion in the second trimester 2, 3
The American College of Radiology suggests that transvaginal ultrasound with color Doppler is superior for detecting vasa previa when velamentous insertion is identified, although the exact sensitivity and specificity are not provided 2, 3

The American College of Radiology recommends considering elective cesarean delivery for monochorionic twins with velamentous insertion and additional complications, as the presence of velamentous insertion in one or both twins increases risk of twin-twin transfusion syndrome from 7% to 27% 2, 3
The American College of Radiology suggests that velamentous insertion increases risk of fetal growth restriction, small for gestational age, and lower gestational age at birth, and when combined with abnormal Doppler findings, cesarean delivery should be strongly considered based on the clinical scenario 2, 3, 4