What is Immunoglobulin G?
Immunoglobulin G (IgG) is part of the immune system response found in blood. If an infection, toxin or foreign body of any kind is detected in the blood stream, the body reacts by pushing IgM (Immunoglobulin M) to the area affected. IgM is the largest antibody. It works to start the healing and recovery process. In the meantime, when IgM responds IgG production quickens. Together with other immunoglobulins, IgG works to basically get rid of the problem.
The three main immunoglobulins, IgG, IgM and IgA are all tested at the same time during a basic blood test, but IgG tests can be ordered separately if food or environmental allergies are suspected. When a foreign body is placed in the blood sample, the reaction is measured and graded on a scale of 0 to IV; IV being the worst reaction measurable with a blood test.
Normal Value Range
- Negative Pregnancy Adult: 700 to 1700 mg/dL or 7 to 17 g/L
- Pregnancy Trimester One: 838 to 1410 mg/dL or 8.38 to 14.1 g/L
- Pregnancy Trimester Two: 654 to 1290 mg/dL or 6.54 to 12.9 g/L
- Pregnancy Trimester Three: 522 to 1146 mg/dL or 5.22 to 11.46 g/L