Nothing new but interesting nonetheless.

https://www.bbc.com/news/health-48396071

Evolutionary paradox: Men's efforts to make themselves more attractive inhibiting their ability to reproduce


anabolic steroids and finasteride

"they are making themselves very unfit in an evolutionary sense, because without exception they had no sperm in their ejaculate at all"

https://www.bbc.com/news/health-48396071

Finasteride has a bad reputation on fertility for sure.

Steroids on the other hand you can be back to natural levels in 2 years (for something like 98% of people), for most much much sooner e.g 6-12 months. If you have a problem with fertility after steroids it's possible you had it beforehand, undiagnosed.

Apart from that, steroids have been looked at as male contraceptives for a long time. None have made it to market, very hard to guarantee full shutdown. Some of these drugs risked erectile dysfunction as they raised estrogen or prolactin a lot. Many are still able to conceive while on a steroid cycle, there are IFBB pros who have kids.