Question

At 35 weeks of pregnancy a woman experiences preterm labor. Tocolytics are administered and she is placed on bed rest, but she continues to experience regular uterine contractions, and her cervix is beginning to dilate and efface. What would be an important test for fetal well-being at this time?

a. Percutaneous umbilical blood sampling (PUBS)

b. Ultrasound for fetal size

c. Amniocentesis for fetal lung maturity

d. Nonstress test (NST)

Answer 1

A nonstress test (NST) is an important test for fetal well-being at 35 weeks of pregnancy during preterm labor; it is safe and provides immediate info on the baby's condition.

Step-by-step explanation:

Importance of Fetal Well-being Tests During Preterm Labor

At 35 weeks of pregnancy, when a woman experiences preterm labor, monitoring fetal well-being is crucial due to the increased risks associated with early delivery. With the woman experiencing regular uterine contractions and cervical changes, an important test for fetal well-being is the nonstress test (NST). This test measures the baby's heart rate in response to its movements. It is non-invasive and can promptly provide information about the baby's current well-being. Alternatives include an ultrasound to assess fetal size, position, amniotic fluid volume, and placental location, or an amniocentesis for fetal lung maturity, which can give valuable information about the baby's ability to breathe effectively outside the womb. In comparison, the percutaneous umbilical blood sampling (PUBS) is typically reserved for more specific diagnostic needs. The NST is generally preferred for its safety and the immediate information it offers regarding the potential for distress or hypoxia that might warrant an emergency intervention or expedited delivery.