Tsinghua Changgung Clinical Case Collection – Obstetrics and Gynecology selects 47 clinical cases of obstetrics and gynecology in our hospital. The book is divided into two parts. The first part contains typical cases, which includes the cases of common and basic diseases in clinical obstetrics and gynecology, and is mainly for the learning of residents, postgraduates, advanced physicians and junior attending physicians of obstetrics and gynecology; the second part comprises intractable cases, including rare and intractable cases as well as patients with serious pathological and physiological abnormalities of multiple organs, and patients who have gynecological malignant tumors and undergone multiple major surgeries in our hospital’s outpatient clinics and wards. The book is intended to be helpful to senior attending doctors and above in their clinical work.