Scientists are baffled by a global dip in sperm counts—much of the western world is down 50% in the last 4 decades—with the mystery exacerbated by antiquated sperm analysis methods unchanged since the 1950s.

Infertility in low-income countries is a neglected reproductive health issue, despite its staggering impact. It’s also under-measured, especially in low-income settings. However, a new approach to measuring the extent of the problem could be a catalyst for change, a team of…