The Indirect Coombs Test (ICT) is the ultimate safety check for your blood. It is a critical screening test that looks for "free-floating" antibodies in your blood serum that could attack and destroy red blood cells. This test is non-negotiable for ensuring blood safety before a transfusion (cross-matching). It is also an essential part of prenatal care for expectant mothers to see if they have developed antibodies that could affect their baby. This simple blood test is a vital, proactive measure to prevent a dangerous immune reaction.