The success rate of Grade 2 fresh embryo transfer is greater than 50% or more, and Grade 1 fresh embryos and Grade 2 fresh embryos are high quality fresh embryos. Embryo transfer is a procedure in which a woman uses ovulation drugs to expel her eggs, removes the eggs and grows them with the man’s sperm to form a fertilized egg outside of the body, and then transfers the fresh embryo to the woman’s uterus under ultrasound guidance to develop 3-5 days later. Although Grade 2 fresh embryos are high quality fresh embryos, the success rate of the transfer is not determined by high quality fresh embryos, but is directly related to the woman’s physical condition, such as age, endometrial status as well as endocrine and emotional conditions. The older the woman is, the lower the success rate of transfer. After the transfer of grade 2 fresh embryos into the woman’s uterine cavity, it is necessary to use progesterone and other medications under the guidance of the doctor to maintain pregnancy. A blood test for human chorionic gonadotropin can be taken 10 days after the transfer to determine whether the transfer has been successful. If any adverse reactions such as abdominal pain or vaginal bleeding occur after the transfer of grade 2 fresh embryos, it is necessary to go to the hospital in time for examination.