The process of conventional IVF is: 1. descending regulation, the purpose is to suppress the LH elevation and LH peak in the pro-superovulation cycle, so that the egg development is better and more synchronized, thus allowing egg retrieval to proceed smoothly. 2. superovulation promotion, the use of drugs to make multiple follicles in both ovaries mature and produce high quality eggs. 3. monitoring follicle development, ultrasound to understand the underlying conditions of the ovaries and uterus, and to understand the number and size of growing follicles in order to 4. egg retrieval, 36 hours after HCG injection under ultrasound guidance or laparoscopy. 5. in vitro fertilization and culture, after egg retrieval the husband masturbates to retrieve the sperm, which is processed and cultured with the eggs and fertilized 12-18 hours later and continues to develop into cells in culture. 6. embryo transfer, 2-3 days after egg retrieval 2-3 days after picking out 2-3 of the best developed embryos are sent back to the uterus. 7. corpus luteum support The embryos will continue to grow and develop in the body to achieve pregnancy.