Which test is used to assess the fetal heart rate response to uterine contractions?

The contraction stress test is specifically designed to evaluate the fetal heart rate response to uterine contractions. In this test, uterine contractions are induced either through nipple stimulation or administration of oxytocin. The fetal heart rate is monitored in response to the contractions to determine how well the fetus tolerates the stress of labor.

A healthy fetal response would show an increase in heart rate during contractions. If the fetal heart rate shows signs of distress or inadequate acceleration, it may indicate potential issues such as uteroplacental insufficiency, which could compromise the baby's oxygen supply during labor. Therefore, the contraction stress test is a vital assessment tool for determining fetal well-being in the context of anticipated labor.

The other tests mentioned serve different purposes. The non-stress test evaluates fetal heart rate patterns in the absence of uterine contractions to assess fetal well-being. The biophysical profile combines ultrasound assessments and fetal heart rate monitoring to provide a comprehensive view of fetal health. Chorionic villus sampling is a diagnostic test used to detect genetic abnormalities but does not assess fetal heart rate response during contractions.