Define cryptorchid.

• A. Less than two visible testicles descended into the scrotum
• B. Two visible testicles descended into the scrotum
• C. One visible testicle descended into the scrotum
• D. Less than two visible testicles descended into the scrotum (correct)

Answer: (D)

Cryptorchid describes a situation where one or both testes have not descended into the scrotum. In a normal horse, two testes are visible in the scrotum. If you see fewer than two, that indicates the cryptorchid condition. This means that one testicle may not have descended, or neither may have descended. The statement that matches this idea is the description of less than two visible testicles in the scrotum, because it covers both unilateral and bilateral cases. A description of two visible testes describes normal anatomy, while one visible testicle is only part of the picture and doesn’t fully define the condition, since cryptorchid includes cases with zero as well.