Frontiers The secrets of menstrual blood: emerging frontiers from diagnostic tools to stem cell therapies Sex differences in glutathione metabolism and acetaminophen toxicity Frontiers Endometriosis Is a Cause of Infertility. Does Reactive Oxygen Damage to Gametes and Embryos Play a Key Role in the Pathogenesis of Infertility Caused by Endometriosis? How IV Therapy Can Improve PMS Symptoms We focus on hormones as doctors, but what I'm learning is there may be more to the picture: fertility begins at the cellular level. Every time a cell produces energy, it also An Overview of the Impact of the Menstrual Cycle on Nutrient Metabolism: An Integrative Perspective