Good thoughts. I think we definitely run into "game" vs "simulation" at that point.
On on hand, Sterilize doesn't cause any long-term problems for females to date, so it would be odd balance-wise to have it cause long-term effects for males.
OTOH, the whole idea is "no preggo", so just making it a mirror to the females' Sterilize is conceptually sound.
I was just suggesting a way to fit it into theme, but you're right, IRL that carries some long-term consequences, so I'm not sure it's the right idea.