In a groundbreaking discovery that could affect millions of potential fathers, researchers at the University of Sheffield have uncovered concerning evidence about marijuana’s impact on male fertility.

Men who smoke marijuana frequently have significantly less seminal fluid, a lower total sperm count and their sperm behave abnormally, all of which may affect fertility adversely, a new study in ...

This article appears in print in the April 2018 issue, as part of the Top Doctors cover story. Click here to subscribe. When one man walked into the Men’s Health Center at the University of Washington ...