Procedures of “IVF”: 1. Pre-operative examination; 2. Controlled ovulation to obtain multiple eggs; 3. Egg retrieval and sperm retrieval; 4. In-vitro fertilization and in-vitro incubation for 3-5 days; 5. Embryo transfer, most of which is carried out on the 3rd-5th day after the retrieval of the eggs; 6. Luteal support after embryo transfer; 7. Early pregnancy paper test and blood test on the 1st 14th day after the transfer to determine the early pregnancy and continue medication. Early pregnancy test and blood test on the 14th day after embryo transfer to determine early pregnancy and then continue medication. Ultrasound examination on the 30th day after the operation and feedback the result to the hospital; 8. Follow-up after pregnancy.