Question

Imagine that you are consulted for an opinion regarding the infertility of a 1-year-old dog. The semen from dog does not contain sperm cells and the testes appear atrophied. Overall, the dog’s appearance resembles that of a puppy; that is, the animal doesn’t have the masculine traits of normal adult males of a similar age. On hunch, you decide to give the dog daily injections of GnRH. Within a month, the dog’s testes enlarge and start producing sperm cells. Moreover, the dog looks more like an adult. The owner is pleased and asks you what sort of miracle you performed. How would you explain your treatment? What would you conclude if your treatment failed to produce noticeable effects?

Answer 1