You can register for gynecology, obstetrics, obstetrics and gynecology, and also for gynecology and obstetrics. Due to the different levels of hospitals, hospitals have different subspecialties for various clinical departments. In large general hospitals, obstetrics and gynecology are strictly separated, while in small hospitals, gynecology and obstetrics are combined together: 1. In large tertiary general hospitals, when checking whether pregnancy or fetal development is normal, you can usually register for obstetrics and gynecology; 2. In lower level general hospitals, the distinction between gynecology and obstetrics is not strict, so you can directly register for obstetrics and gynecology; 3. In some hospitals, there is no obstetrics and gynecology but only separate gynecology and obstetrics. In some hospitals, there is no obstetrics and gynecology department but only a separate gynecology department, so you can directly register for the gynecology department; 4, if you go to the community service center, township health center and other primary care units, you can register for the gynecology department.