Lowering testosterone decreases libido? You don't say.

those taking the highest DMAU dosage had hormone changes that, theoretically, meant they could theoretically no longer impregnate a woman. Because the men’s sperm count wasn’t monitored, though, it’s impossible to say if this is actually true.

Might have been useful to actually measure that.

So, like cold fusion and room-temperature superconductors, a male birth control pill is 'right around the corner'.