Related Experiment Video
Updated: Aug 10, 2026

Laparoscopic Extracorporeal Knot-Tying for Uterine Vessel Occlusion during Hysterectomy with Cervical Cerclage in Large Uteri
Published on: September 12, 2025
Four true umbilical cord knots
Anjana Srinivasan1, Lisa Graves1
1Sir Mortimer B. Davis Jewish General Hospital Department of Family Medicine, Montreal QC.
Background:
True umbilical cord knots are rare, but may be associated with intrapartum fetal distress and perinatal complications.
Case:
This report describes a pregnancy complicated by intrauterine growth restriction and oligohydramnios. The labour was complicated by a non-reassuring fetal heart rate tracing. Four umbilical cord knots were discovered at the time of delivery. The baby's neonatal course was uncomplicated.
Conclusion:
There is currently no reliable method of detecting umbilical cord knots using ultrasound or colour Doppler flow studies. Cord knots may be responsible for fetal compromise during labour and delivery.
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