[Alter Kaker]

Not if you’re low in it and just bringing it up to normal.

Nope. That's exactly what happens.

[ConservativeMind]

Good catch on that. Testosterone has a bad feedback mechanism, while an estrogen blocker is apparently what is needed to help the body make sperm.

https://www.freedomfertility.com/blog/medications-used-for-male-infertility/