Urine can be tested on day 10-15 of blastocyst transfer. Human chorionic gonadotropin (HCG) in the urine can only be tested if it reaches a certain concentration after pregnancy. If the time is short, the concentration will not be reached to test it. Therefore, it is best to use a pregnancy test more than 10-15 days after the transfer procedure to be more accurate. About 10 days after the blastocyst transfer, go to the hospital for a blood test of HCG to confirm whether you are pregnant. As long as the HCG value exceeds the normal reference value, pregnancy is confirmed. The normal reference value is 0~5μg/L in some hospitals and 0~10mIU/ml in some hospitals, so you need to analyze it according to the reference value of your hospital. After blastocyst implantation, you need to take more bed rest, and if you have any symptoms or discomfort, you need to go to the hospital as soon as possible, and the doctor will formulate individualized diagnosis and treatment plan according to your specific condition.