USMLE-Rx Step 2 Qmax Challenge #21136

Check out today’s Step 2 CK Qmax Question Challenge.

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A 24-year-old G3P1 woman pregnant with twins at 34 weeks’ gestation presents to her obstetrician complaining of irregularly timed abdominal cramping and contractions. The discomfort is localized to her pelvis and has not gotten worse with time. The cervix is neither dilated nor effaced on cervical examination, and the amniotic sac is intact. During this visit a biophysical profile is performed and is normal except for a low amniotic fluid index, indicating oligohydramnios. The patient previously had an ultrasound during the second trimester and did not have oligohydramnios at that time.

Which of the following, if present, would be most likely to contribute to the development of oligohydramnios?

A. Fetal duodenal atresia
B. Maternal gestational diabetes
C. Maternal hypertension
D. Multiple gestation
E. Rh incompatibility


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