Both lying flat and lying on the side after the transfer have no effect on the success rate. The main reasons affecting the implantation include the quality of the embryo, the endometrial tolerance, the mood of the individual, and the age of the individual. Usually, good embryo quality will make it easier to implant. Endometrial tolerance refers to the ability of the endometrium to accept the embryo, which is affected by various factors, and usually the transfer will be made in a period of good endometrial tolerance. If there is too much psychological stress after the transfer, it may lead to abnormal hormone secretion in the body, which may affect the development of follicles and have a certain impact on the success rate of IVF. In terms of age, the older you are after transplantation, the lower your chances of successful fertilization will be, because at an older age, the reserve function of the ovaries will slowly appear to diminish, and it is not easy to carry out transplantation. After transplantation, you need to be careful to avoid strenuous exercise, but do not need to be absolutely bedridden.