An endometrial lining of 5mm thick is not recommended for implantation, mainly because a thin lining increases the likelihood of risks such as failure of fertilized egg implantation, pre-miscarriage, and embryo abortion. The thickness of a woman’s uterine lining is between 8mm and 12mm, if the lining is only 5mm, it proves that the lining is too thin, and even if the transfer is successful, the fertilized egg will still be difficult to implant, which may lead to miscarriage and embryo deactivation. Therefore, it is not recommended to undergo IVF when the endometrium is 5mm, and the body should be conditioned for a period of time before undergoing the transplantation. It is recommended that women who are ready for transplantation should go to the hospital for a detailed physical examination to determine whether the organism meets the criteria for transplantation, and then consider IVF transplantation after the thickness of the endometrium reaches the standard under the guidance of the doctor.