True or false: The contraction stress test is considered an invasive procedure.

• A. True
• B. False
• C. It varies by facility
• D. Only for fetal monitoring

Answer: (A)

The contraction stress test (CST) is indeed considered an invasive procedure because it involves monitoring the fetus's response to contractions induced either by administering oxytocin or through nipple stimulation. During this test, the fetal heart rate is assessed while the mother experiences contractions, which can provide important information about the health of the fetus.

Invasive procedures typically involve some level of risk or intervention that goes beyond non-invasive techniques, such as ultrasounds or routine fetal heart rate monitoring. The CST specifically requires the provocation of contractions, which makes it more invasive than simple monitoring practices.

In contrast, other options suggest varying interpretations of invasiveness or situational factors, whereas the nature of the CST clearly categorizes it as an invasive procedure based on its method of execution and the level of intervention required.