This book aims to provide updated facts and treatments for practicing gynecologists and postgraduate doctors to enhance their understanding of pathogenesis, pathology, symptoms and diagnostic imaging technology of adenomyosis, such as to select appropriate treatments, to improve the symptoms, fertility and the quality of life of women with adenomyosis. This book also particularly introduces the new treatment for adenomyosis using the non-invasive High Intensity Focused Ultrasound ablation treatment. Hopefully, it will provide a better understanding of its operation, effectiveness, and pregnancy outcome, to formulate a more successful treatment strategy for this disease.