“…Coagulation F 9 umbilical cord blood for prenatal diagnosis of hemophilia A, 27 we did not suggest that the level of F9 clotting activity in umbilical cord blood could be used as a reference resource, because the levels of F9 clotting activity would be increased during the gestation and did not consistent with the results of gene detection in our practice. This report recommended the use of specific standard terminology: "pathogenic," "likely pathogenic," "uncertain significance," "likely benign," and "benign" to describe variants identified in Mendelian disorders.…”