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    Contraction Stress Test

    Contraction Stress Test

    A contraction stress test (CST) measures the fetus's ability to tolerate the stress of uterine contractions started (induced) before true labor begins.

    Electronic fetal heart monitoring is done during a contraction stress test to evaluate the fetus's heart rate during contractions. The fetus's heart rate during contractions helps evaluate the placenta's ability to provide enough oxygen to the fetus.

    A contraction stress test that shows the placenta is not supplying enough oxygen to the fetus will help the doctor determine the safest method of delivery.

    A contraction stress test is also called an oxytocin challenge test.

    Current as of: May 30, 2016

    Author: Healthwise Staff

    Medical Review: Sarah Marshall, MD - Family Medicine & Adam Husney, MD - Family Medicine & William Gilbert, MD - Maternal and Fetal Medicine & Femi Olatunbosun, MB, FRCSC - Obstetrics and Gynecology

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