Ultrasound Registry Review (URR) Abdomen Practice Exam

At approximately how many weeks do the testes descend into the scrotal sac?

32 weeks 34 weeks 35 weeks 36 weeks

Correct Answer:

36 weeks

Explanation:

Testicular descent into the scrotum occurs in late gestation, during the inguinoscrotal phase, and is typically completed around the final weeks of pregnancy. The common approximate time is about 36 weeks gestation. By this point the testis has moved through the inguinal canal into the scrotum, guided by the gubernaculum and driven by hormonal and neural signals such as testosterone and the genitofemoral nerve. Most testes are in the scrotum by birth; if descent isn’t complete, it may be cryptorchidism, which can require monitoring or treatment in infancy.

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