For the long regimen, the injection is given for 14 days, starting on day 21 of the menstrual cycle, and stopping on day 7 of the next menstrual cycle, when follicle growth medication is given to promote follicle growth. The shorter protocol is to start the injection on day 2-3 of the menstrual cycle, and the injection should be given for 7 days to promote follicle growth. After the pituitary gland has normalized its hormone secretion, follicle growth and ovulation promotion medications are given to regulate the menstrual cycle and promote the development of multiple follicles to obtain multiple mature eggs. Women need to be given descending injections for treatment before IVF, and the doctor will choose either a long or short protocol for treatment depending on the condition.