Still impacted by the major limitation that sperm are matured for three months, so it only becomes effective after three months of consistent use

Snip-snip gang represent.

Going several months with blocked vitamin A metabolism sounds like it'd lead to a vitamin deficiency of some kind.

Even if this works, you’d need to be jacking it for a week to clean out the swimmers in your tubes. And I’d bet it’s still not 100% It probably just brings it below “ideal sperm count.”

What happened to vasalgel?

As my 50th college reunion approaches, I recall my organic chemistry professor telling us around 1975 that male birth control pills were already available, there just weren't enough takers to make them commercially viable.