People have children on TRT all the time. Bodybuilders, and they use massive amounts of testosterone, also have children all the time.

It is true, testosterone can reduce your level of fertility but not to the extent as once thought. Decades ago it was thought that testosterone might be a good male birth control, but after numerous men continued to have children this was proven false.

Advice, consider HCG. HCG can help protect your fertility when using testosterone. Many men find their potency to be even stronger when on HCG. HCG and testosterone can be used together and HCG generally helps TRT in other ways.

An important note - low testosterone has been linked to impotency.