Normally, it takes half a month after the frozen embryo transfer to test for pregnancy in the urine. Therefore, the ninth day is a big white plate indicates that the pregnancy has not been detected for the time being, but the embryo may still be viable. After the embryo transfer, the embryo will secrete HCG, which can be detected in the blood seven days after the transfer and in the urine half a month later. Therefore, the earliest reflection of pregnancy should be the blood HCG. If the urine test on the ninth day shows that there is no pregnancy, you can wait until five days later to take a pregnancy test. Women are advised to keep a good attitude after the frozen embryo transfer, wait patiently, and eat more high-protein and easy-to-digest food, which will help the embryos to implant. If a woman wants to know whether the embryo is viable or not, she is advised to consult a doctor in time and complete the relevant examinations under the doctor’s guidance for further clarification.