 One in six couples worldwide faces fertility challenges. This comes from a recent study from the World Health Organization. WTOP's Ralph Fox reports there are ways to improve those numbers. Dr. Ryan Stone is a urologist with UVA Health and says many times the infertility issue is connected to the male and that being overweight is a big factor. That affects a number of different things. So obviously it's a systemic problem. So it affects hormones. It affects sperm count.