Repeated failure of embryo implantation is usually related to poor embryo development, thin endometrium and other reasons. 1. Poor embryo development: If the embryo develops with chromosomal abnormality, it may suffer from poor development, which may lead to its failure to implant easily. 2. Thin endometrium: usually, the endometrium has to be of a certain thickness before the embryo can be properly implanted. If the thickness of the endometrium is not up to the standard due to its own physical problems or factors such as abortion or uterus removal surgery, the problem of repeated failure of embryo implantation will also occur. There may also be other reasons for the repeated failure of embryo implantation, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy.