Why do the testes decent in a human male fetus before birth?

The testes descend in a human male fetus before birth to ensure optimal conditions for sperm production and fertility. The descent occurs from the abdominal cavity into the scrotum, where the cooler temperature is necessary for spermatogenesis. This process is influenced by hormonal changes, particularly testosterone, and is crucial for the proper development of the male reproductive system. If the testes do not descend properly, it can lead to conditions such as cryptorchidism, which may affect fertility and increase the risk of testicular cancer.