02/19/2026
Umbilical Cord Spiraling Index (UCSI): Coiling Quantification
The Umbilical Cord Spiraling Index is a quantitative measure of cord coiling per unit length, reflecting underlying fetal vascular development and hemodynamic forces.
🔬 Normal range: 0.2–0.6 coils/cm
⬇️ Hypocoiled cords (0.6): Linked to thrombosis, IUGR, and compromised fetoplacental circulation
Understanding cord coiling patterns enhances placental examination and clinicopathological correlation in obstetric pathology.