The ABO blood types were first discovered by an Austrian physician, Karl Landsteiner, working at the Pathological-Anatomical Institute of the University of Vienna (now Medical University of Vienna).

Nov 11, 2025 · ABO blood group system, the classification of human blood based on the inherited properties of red blood cells (erythrocytes) as determined by the presence or absence of the …

Blood types are determined by the presence or absence of certain antigens – substances that can trigger an immune response if they are foreign to the body. Since some antigens can trigger a …

Nov 20, 2025 · The ABO/Rh test is the standard procedure used to determine an individual’s blood type. This classification system is based on the presence or absence of specific markers, known as …

Nov 28, 2023 · While less common and usually less severe than Rh incompatibility, ABO incompatibility can also occur during pregnancy. This happens when the mother and baby have different ABO blood …

There are eight blood types included in the ABO and Rh blood group systems: A positive (A+), A negative (A-), B positive (B+), B negative (B-), AB positive (AB+), AB negative (AB-), O positive (O+), …

Feb 19, 2025 · The four major blood groups are based on whether or not you have two specific antigens — A and B. Doctors call this the ABO Blood Group System. Group A has the A antigen and B antibody.

Aug 20, 2025 · The ABO blood group system classifies blood into four types—A, B, AB, and O—based on the presence or absence of A antigens and B antigens on red blood cells.

Apr 26, 2025 · The ABO blood group system was first discovered in the early 1900s, and our understanding of it has significantly increased since then. These advancements have contributed to …

For a blood transfusion, the ABO blood group system is used to match the blood type of the donor and the person receiving the transfusion. People with blood type O can donate blood to anyone and are …