Blood test to determine the patient's blood type before transfusion. Determine the mother's blood type to assess the risk of blood type incompatibility between mother and child.

Blood type is one of the biological characteristics of humans, determined by genes, currently people have recorded about 36 blood types. In terms of application in medical facilities, the two most used blood group systems are ABO and Rh. The ABO blood group system includes four blood groups A, B, O and AB. Each person will belong to one of the four blood groups above. In addition, there are subgroups A1, A2, A3, Ax, B3, Bx, Bm. The Rh blood group system has two main blood groups: RhD positive and RhD negative. Each person will belong to one of the two blood groups above.

Each blood type has its own characteristics. In addition to blood testing standards to detect and prevent blood-borne viruses, it is also necessary to follow the correct principles of blood transfusion.

The ABO blood group system is characterized by the presence of A and B antigens on the surface of red blood cells. ABO blood group testing is necessary in the treatment and prevention of patients.