The expression “my biological clock is ticking” is often associated with women. But new research underscores just how much it applies to men. This study comes out of the Colorado Center for Reproductive Medicine. And it’s the first of its kind to follow males from puberty through middle age and beyond. Males in this case were mice, which can actually tell us a lot about people. Mandy Katz-Jaffe sat down with Ryan Warner, before presenting her paper today at a conference in Florida. [Photo: Colorado Center for Reproductive Medicine]