At 35 weeks of pregnancy, a woman experiences preterm labor. Although tocolytics are administered and she is placed on bed rest, she continues to experience regular uterine contractions, and her cervix is beginning to dilate and efface
What would be an impor-tant 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
C
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A Indications for PUBS include prenatal diagnosis or inherited blood disorders, karyotyping of malformed fetuses, detection of fetal infection, determination of the acid-base status of the fetus with intrauterine growth restriction, and assess-ment and treatment of isoimmunization and thrombocytopenia in the fetus.
B Typically fetal size is determined by ultrasound during the second trimester and is not indicated in this scenario.
C Amniocentesis would be performed to assess fetal lung maturity in the event of a preterm birth.
D A nonstress test measures the fetal response to fetal movement in a noncon-tracting mother.
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