Umbilical Cord Prolapse

ByJulie S. Moldenhauer, MD, Children's Hospital of Philadelphia
Reviewed/Revised Jan 2024
View Patient Education

Umbilical cord prolapse is abnormal position of the cord in front of the fetal presenting part, so that the fetus compresses the cord during labor, causing fetal hypoxemia.

    The prolapsed umbilical cord may be

    • Occult: Contained within the uterus

    • Overt: Protruding from the vagina

    Both are uncommon.

    Occult prolapse

    In occult prolapse, the cord is often compressed by a shoulder or the head. The only clue may be a fetal heart rate pattern (detected by fetal monitoring) that suggests cord compression and progression to hypoxemia (eg, severe bradycardia, severe variable decelerations).

    Changing the woman’s position may relieve pressure on the cord; however, if the abnormal fetal heart rate pattern persists, immediate cesarean delivery is necessary.

    Overt prolapse

    Overt prolapse occurs with ruptured membranes and is more common with breech presentation or a transverse lie. Overt prolapse can also occur with vertex presentation, particularly if membranes rupture (spontaneously or iatrogenically) before the head is engaged.

    Drugs Mentioned In This Article

    quizzes_lightbulb_red
    Test your KnowledgeTake a Quiz!
    Download the free Merck Manual App iOS ANDROID
    Download the free Merck Manual App iOS ANDROID
    Download the free Merck Manual App iOS ANDROID