📌 Introduction
During a routine prenatal ultrasound, you may hear the term
“umbilical vein varix (UVV)”
This can be worrying for many parents.
👉 “Is this dangerous?”
👉 “Will my baby be okay?”
Let’s break it down in simple terms.
📌 1. Key Point First
👉 Most cases have a good outcome
👉 But regular follow-up is essential
📌 2. What is Umbilical Vein Varix?
The umbilical vein carries oxygen and nutrients from the placenta to the fetus.
👉 When a portion of this vein becomes focally dilated,
it is called Umbilical Vein Varix (UVV).
📌 3. How Does It Look on Ultrasound?
- A round or oval anechoic structure in the fetal abdomen
- Color Doppler confirms blood flow
- Usually diagnosed when the diameter is
👉 ≥ 9 mm
📌 4. Is It Dangerous?
👉 Most cases are benign and result in normal delivery
However, careful monitoring is needed if:
- Abnormal or turbulent blood flow
- Rapid increase in size
- Suspicion of thrombosis
👉 In these cases, closer follow-up is recommended
📌 5. Management
👉 There is no specific treatment
👉 Follow-up ultrasound is the key
- Every 1–2 weeks
- Doppler flow evaluation
- Fetal growth monitoring
📌 6. Important Reminder
👉 In UVV, changes over time are more important
than the initial finding.
📌 Key Takeaway
👉 Umbilical vein varix is a rare finding
👉 But most cases are safe with regular monitoring
Fetal umbilical vein varix with color Doppler flow