On the fifth day after embryo transfer, the embryo has not yet implanted in the uterine cavity and therefore does not secrete chorionic gonadotropin, so the patient will not experience nausea, vomiting and other early pregnancy reactions. The nausea and vomiting that occurs at this time may be caused by the woman’s excessive nervousness or the consumption of fatty food after the transplantation. In this case, women should pay attention to proper rest, avoid getting cold and flu, and eat a light diet with high protein, high fiber and low fat, and eat less and more meals. If necessary, you can also go to the hospital to take a blood test for chorionic gonadotropin to clarify whether there is a possibility of pregnancy, if the level is normal, women should not be overly nervous, you can check the blood HCG again five days later, the results will be more accurate.