> I read this as an indicator that at least significant parts of the transition in this age range for men - acknowledged for a long time now - are just as big as menopause

Men emerge from it with their fertility intact.

Sorry but your post as strong #notallmen vibes. The article itself mentions that part of those changes might just be explained by lifestyle changes at 40s. I quote:

> It's possible some of these changes could be tied to lifestyle or behavioral factors that cluster at these age groups, rather than being driven by biological factors, Snyder said.

Changes in women metabolism due to menopause are pretty known and proved, and men don't experience it. I'm a mid-40s male as well.