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Immunoglobulin G (IgG) Antibodies

Immunoglobulin G (IgG) antibodies are proteins made by the body's natural defense system (immune system). They attack and destroy things that they recognize as different from the body's normal healthy tissues, such as bacteria and viruses.

IgG antibodies are found in all body fluids and are very important in fighting infections. They are the most common of the five major types of antibodies. IgG antibodies can cross the placenta in a pregnant woman to help protect the fetus.

By Healthwise Staff
Primary Medical Reviewer E. Gregory Thompson, MD - Internal Medicine
Specialist Medical Reviewer Joseph O'Donnell, MD - Hematology, Oncology
Current as of August 6, 2012

WebMD Medical Reference from Healthwise

Last Updated: August 06, 2012
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.