Spermatogenesis, DNA fragmentation, varicocele, environmental toxins, and the fertility-testosterone tradeoff—evidence-based fertility education. This page is part of the Male Health hub on Evidence Before Claims. Content is for educational purposes only and is reviewed against peer-reviewed studies, FDA labeling, and current clinical guidelines. It does not provide diagnosis,
Reviewed by Sarah Chen, MD (illustrative reviewer) — MD, Internal Medicine. Last reviewed: May 2026. Educational content only; not medical advice.