A blood draw of HCG 174 IU/L on the tenth day of blastocyst is normal. In IVF, when the blastocysts are transferred for about a week, the fertilized egg will be implanted and the HCG level can be checked and when it reaches the tenth day, the HCG level is elevated and if the value is between 50-500 IU/L, it means that the blastocysts transfer has been successful. Therefore, an HCG value of 174 IU/L on the tenth day of blastocyst is normal, but does not determine the development of the embryo. Normally, during the first eight weeks of pregnancy, the HCG value increases rapidly, doubling at the rate of every two days. Therefore, it is recommended that pregnant women have weekly HCG tests to clarify the embryo’s condition, and if the HCG does not double, it means that the embryo is developing slowly. After eight weeks of pregnancy, the HCG value will gradually decrease. After 50 days of blastocyst transfer, it is also necessary to go to the hospital for ultrasound examination to clarify the development of the fetus.