The difference between gynecology and obstetrics lies in the different audiences, different research directions, and different diseases diagnosed and treated. 1. Different audiences: the audience of gynecology is often women who are not pregnant, while the audience of obstetrics is mostly women who are already pregnant. 2. Different research directions: Gynecology mainly focuses on the study of pathological and physiological changes in the female reproductive system during non-pregnancy, while obstetrics mainly focuses on the study of pathological and physiological changes in the maternal embryo and fetus during pregnancy, childbirth and puerperium. 3. Diagnosis and treatment of different diseases: gynecology mainly focuses on genital diseases, such as pelvic inflammatory disease, cervical polyps, cervicitis, vaginitis, uterine fibroids, cervical erosion and other diseases. Obstetrics is more concerned with the examination and treatment of pregnancy, such as prenatal examination, as well as cesarean section, vaginal trial of labor and so on. There is still a difference between obstetrics and gynecology, and patients are advised to choose the appropriate department according to their needs.