nuchal cord
Pronunciation: NEW-kal
Umbilical cord wrapped around the fetal neck, occurring in approximately 25-30% of deliveries.
Full Definition
A nuchal cord occurs when the umbilical cord becomes wrapped around the fetal neck during pregnancy or labor. This is a relatively common occurrence, present in about one-quarter to one-third of all deliveries. Most nuchal cords are loose and do not cause complications, but tight nuchal cords can potentially restrict blood flow or complicate delivery. The condition can be detected during ultrasound examination and is often managed expectantly. During delivery, the cord can usually be slipped over the baby's head or clamped and cut if too tight to allow safe delivery.
Usage
Usage note: Distinguish from umbilical cord prolapse, which is a more serious obstetric emergency.
In Context
- "Ultrasound examination at 36 weeks revealed a loose nuchal cord." — Prenatal imaging report
- "The nuchal cord was easily reduced over the fetal head during delivery." — Delivery note