Case Study:

A 17-year-old primigravida has noted no fetal movement during the pregnancy, and she is now at 18 weeks gestation. Oligohydramnios is noted on ultrasound scan, making it difficult to visualize fetal internal organs, but the size of the baby appears consistent for 18 weeks gestational age. Following a counseling session with their physician, the parents decide to proceed with prostin induction for a medically indicated termination of pregnancy. Autopsy reveals no external anomalies upon examination of the stillborn male.

Which of the following findings is most likely to explain this deformation sequence?

A Toxoplasmosis

B Urethral atresia

C Tracheal stenosis

D Imperforate anus

E Right renal agenesis
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Answer / Explanation:

[HIDE]

(B) CORRECT.

The oligohydramnios is part of a deformation sequence resulting in pulmonary hypoplasia. The urethral atresia precludes output of fetal urine.[/HIDE]