Why do bodybuilder’s testicles shrink when taking testosterone/growth hormones rather than getting bigger?

Question

As title says, it seems counterintuitive that a side-effect of steroids and other enhancing drugs is a shrinkage of the testicles when I always associate testicles with testosterone levels.

In: Biology

Answer 1

You’re body is getting an external amount of steroids so your testicles don’t need to produce as much. Like your muscles shrinking when you don’t use them