Before the test starts, the fetal heart rate will be tracked for around 20 minutes.
Prior to the CST, the fetal heart rate (FHR) is monitored for around 20 minutes to establish the baseline variability and check for any unrelated changes in the FHR. During three to five uterine contractions spaced out over a ten-minute period, the fetal heart rate is being monitored as part of the test. A urine sample is unnecessary. The semi-Fowler position with a left-sided tilt is the position of choice.
An examination for pregnant women is called a contraction stress test (CST). Throughout uterine contractions, it monitors your baby for indications of stress. Your doctor administers a hormone that causes your uterus to contract during the test. Although they resemble labor contractions, these contractions usually don't lead to the onset of labor.
Your baby's blood and oxygen levels temporarily fall during labor contractions. Most babies can cope with this reduction. Even after the contraction is ended, however, the heart rates of some infants decrease. To see whether your baby can withstand the decrease in blood and oxygen, a CST simulates labor contractions.
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