A TORCH 4 IgM panel is a blood test used to detect recent or active infections of four specific diseases that can be harmful during pregnancy. Unlike the IgG test (which shows long-term immunity), the IgM (Immunoglobulin M) marker is the “first responder” antibody produced by the immune system when it encounters a new threat.
The “4” refers to the core group of infections: Toxoplasmosis, Rubella, Cytomegalovirus (CMV), and Herpes Simplex Virus (HSV).
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