IVF is an artificial method of combining sperm and eggs to form a fertilized egg that is then implanted into the mother’s body. The long protocol of IVF down regulation is the classic protocol of down regulation when doing IVF, with a longer medication time of around 20 days, which is the use of drugs to artificially block the biological cycle, and then the use of gonadotropins to promote follicle development, which can take more than one mature egg to increase the success rate of IVF. The use of the long regimen of descending regimen prevents early ovulation, the eggs develop in a uniform size, and multiple available embryos can be obtained. There are long and short regimens of IVF descending regimen, which require a visit to the hospital for examination, and the doctor will choose the appropriate regimen according to the patient’s specific situation, ovarian function, and ovulation. If the follicles are mature, you should go to the hospital for egg retrieval in time. After egg retrieval, pay attention to rest and do not engage in strenuous activities to avoid ovarian hyperstimulation syndrome.