So far, there’s no male birth control pill on the market. But there are two types of birth control pills in the works: YCT-529 and dimethandrolone undecanoate. YCT-529 is a hormone-free male birth control pill that aims to stop your body from making sperm by targeting the vitamin A signaling that makes sperm production possible.

Researchers studied the effects of this male birth control pill on animals. They found that in mice, after four weeks of use, it was 99% effective in preventing pregnancies. In primates, sperm counts dropped in just two weeks of use. Researchers also completed a phase 1 human study to test how safe and tolerable the drug is. Now, they’re recruiting participants for a phase 1B/2A study, but more research is needed before this drug can hit the market.

The other male birth control pill, dimethandrolone undecanoate (DMAU), may also be available as an injectable. This one is a hormonal birth control, meaning it impacts your male sex hormones, causing them to temporarily stop your body from making sperm.

In a phase 1 study, participants took DMAU for 28 days. But the participants weren’t relying on DMAU for birth control, so more research is needed. Even though a phase 2 trial is in the works, it’s not complete.

https://www.webmd.com/sex/birth-control/male-contraceptives

Huh. I thought the trials had been completed, but I guess not. Feels like I remember hearing about them like 4-5+ years ago.