Screening at 24 weeks of gestation reveals that a pregnant woman has gestational diabetes mellitus (GDM). In planning her care, the nurse and the woman mutually agree that an expected outcome is to prevent injury to the fetus as a result of GDM. The nurse identifies that the fetus is at greatest risk for:

Choice A reason: The NST has no known contraindications, as it is a non-invasive and safe test that does not stimulate uterine contractions or cause fetal distress. It is the most widely used method of antepartum fetal surveillance.

Choice B reason: The NST is not slightly more expensive than the CST, as it requires less time and equipment. The NST usually takes 20 to 40 minutes, while the CST may take up to 2 hours. The NST only needs a fetal monitor, while the CST also needs an intravenous line and oxytocin infusion.

Choice C reason: The NST does not have fewer false-positive results than the CST, as it has a higher rate of nonreactive results that may indicate fetal compromise when there is none. A nonreactive NST is one that does not show at least two accelerations of the fetal heart rate of 15 beats per minute or more lasting 15 seconds or more in a 20-minute period.

Choice D reason: The NST is not more sensitive in detecting fetal compromise than the CST, as it has a lower predictive value for fetal well-being. A reactive NST is one that shows at least two accelerations of the fetal heart rate of 15 beats per minute or more lasting 15 seconds or more in a 20-minute period. However, a reactive NST does not rule out the possibility of fetal hypoxia or acidosis.

Choice A reason: Limiting fluid intake throughout the day is not recommended, as dehydration can worsen nausea and vomiting. Instead, pregnant women should sip fluids gradually throughout the day to maintain hydration. Proper hydration supports digestion and helps prevent complications like electrolyte imbalances. Clinical guidelines emphasize the importance of maintaining adequate fluid intake during pregnancy

Choice B reason: Drinking a glass of water with a fat-free carbohydrate before getting out of bed in the morning is a good strategy to prevent nausea and vomiting, as it can stabilize the blood sugar level and prevent an empty stomach. However, it is not the best answer, as it does not address the dietary needs throughout the day.

Choice C reason: Increasing the intake of high-fat foods is not recommended, as it can worsen nausea and vomiting. High-fat foods are harder to digest and can cause gastric irritation and reflux. The pregnant woman should choose low-fat, bland, and easy-to-digest foods.

Choice D reason: Eating small, frequent meals every 2 to 3 hours is the best approach to managing nausea and vomiting during pregnancy. This strategy helps stabilize blood sugar levels and prevents the stomach from becoming too empty or too full, both of which can trigger nausea. Clinical guidelines widely support this dietary adjustment as a primary intervention for nausea and vomiting in pregnancy