The best time for IVF is in the middle of the menstrual cycle. The best time for IVF is in the middle of the menstrual cycle, which is divided into the follicular phase, the luteal phase and the ovulation phase. In the mid-menstrual cycle, the ovary secretes luteinizing hormone to maintain the thickness of the uterine lining. This period is more conducive to the implantation of fertilized eggs, so this period is the best time to do IVF. Before doing IVF, you need to do a good pre-pregnancy examination whether you are suitable for IVF. Such as routine blood test, liver and kidney function, blood routine, urine routine, chromosome test, semen test and so on. During the preparation for pregnancy, you can appropriately relax your mood, do not give yourself much pressure, and you need to take folic acid in the first three months of preparation for pregnancy, which can reduce the chance of fetal neural tube malformation.