Endometriosis is one of the most common gynecological diseases, causing pelvic pain, infertility, and cancer. The condition reduces the quality of life for the estimated 10% of menstruating women who are affected by it. This book provides a clear insight into the pathogenesis and pathophysiology of endometriosis—essential information for clinicians intending to successfully treat the condition. The first part covers a range of topics including stem cells, NK cells, macrophages, inflammation, cytokines, epigenetics, prostaglandin, sex steroids, aromatase, apoptosis, nerve fibers, and malignant transformation to aid in understanding the pathogenesis and pathophysiology of the disease. The second part provides useful tools for therapy, specifically, notable recent techniques in prevention, imaging, biomarkers, medical treatments, surgical treatments, prevention of recurrence, and infertility treatments. Each chapter was written by an expert in the field, with nearly 40 researchers and clinicians contributing to the work. This book will be highly useful to clinicians as well as to research scientists who are interested in this enigmatic disease.