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Related Experiment Video

Updated: Jul 5, 2026

External Cephalic Version: Is it an Effective and Safe Procedure?

External Cephalic Version: Is it an Effective and Safe Procedure?

Published on: June 6, 2020

Minimum cord length that allows spontaneous vaginal delivery.

Gene E LaMonica¹, Margaret L Wilson, Anne M Fullilove

¹Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, School of Medicine, University of New Mexico, Albuquerque 87131, USA. glamonica@salud.unm.edu

The Journal of Reproductive Medicine

|April 30, 2008

Summary

The shortest umbilical cord length permitting vaginal delivery is not definitively established, but short cords (<13 cm) are rare and typically associated with lateral placental implantation. Fundal implantation rarely presents with excessively short cords.

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Surgical Technique for Spinal Cord Delivery of Therapies: Demonstration of Procedure in Gottingen Minipigs

Surgical Technique for Spinal Cord Delivery of Therapies: Demonstration of Procedure in Gottingen Minipigs

Published on: December 7, 2012

Area of Science:

Obstetrics and Gynecology
Fetal Development
Perinatal Medicine

Background:

Umbilical cord length is a critical factor in fetal well-being and delivery outcomes.
Understanding the minimum cord length required for spontaneous vaginal delivery is essential for clinical practice.

Purpose of the Study:

To determine the shortest umbilical cord length compatible with spontaneous vaginal delivery.
To investigate the influence of placental implantation site on cord length and delivery.

Main Methods:

Prospective, observational study of 166 women delivering spontaneously at or beyond 37 weeks.
Umbilical cord length measured from maternal introitus to placental insertion immediately postpartum.
Placental implantation site (fundal or lateral) identified via fetal scan.

Main Results:

Mean umbilical cord length measured 22.4 cm.
Cords were 2.1 cm longer with fundal vs. lateral placental implantation (p < 0.01).
Excessively short cords (<13 cm) occurred in 1.2% of cases with lateral implantation, none with fundal.

Conclusions:

Spontaneous vaginal delivery is generally not prevented by short umbilical cords due to uterine and birth canal dimensions.
Placental location rarely impedes delivery, except potentially with fundal implantation and an excessively short cord.