In vitro fertilization can be divided into these steps 1. Controlled super ovulation: Ovulation stimulating drugs are used to help multiple follicles develop and obtain multiple eggs and good quality embryos to increase the pregnancy rate. 2. Follicle monitoring: During ovulation promotion, vaginal ultrasound is used to monitor the size of the follicles, together with blood sampling to check the E2 value and adjust the dosage of medication. After the follicles are mature, the eggs will be retrieved 34~36 hours after HCG injection. 3.Egg retrieval: Under the guidance of vaginal ultrasound, an egg retrieval needle is passed through the vaginal wall and directly to the ovaries to aspirate the eggs, with optional anesthesia. 4.Sperm retrieval: At the same time of egg retrieval, the male partner needs to retrieve the sperm. 5.In vitro fertilization: 4~5 hours after egg retrieval, the processed sperm and eggs will be cultured in the same Petri dish. 6.Embryo transfer: embryos can be transferred after 2-6 days of culture. 7.Fetal preservation: At present, we mostly use progesterone to preserve the fetus until about 8-10 weeks. 8, 10-14 days after embryo transfer, blood test for HCG to clarify if you are pregnant. The cost of IVF, what is the success rate Success rate: The current success rate of IVF is between 50-60%. The success rate for women between the ages of 20 and 35 is higher than the average of 50-60%, but after the age of 35 the success rate gradually decreases, reaching only about 10-20% above the age of 40.