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        Immunoglobulin G (IgG)

        Immunology

        Sample and container requirements

        Serum

        Minimum volume required

        4 ml Blood

        Special requirements

        none

        Patient preparation

        None

        Sample viability

        7 days when stored at 4C or frozen

        Turnaround time

        3 days

        Reference range

        Age related reference range:- Cord 5.2-18.0g/L 0-2 weeks 5.0-17.0 g/L, 2-6 weeks 3.9-13.0 g/L, 6-12 weeks 2.1-7.7 g/L 3-6 months 2.4-8.8 g/L, 6-9 months 3.0-9.0 g/L,9-12 months 3.0-10.9 g/L 1-2 yrs 3.1-13.8 g/L, 2-3 yrs 3.7-15.8 g/L, 3-6 yrs 4.9-16.1 g/L 6-9 yrs 5.4-16.1 g/L, 9-12 yrs 5.4-16.1 g/L 12-15 yrs 5.4-16.1 g/L 15-45 yrs 6.0-16.0 g/L >45yrs 6.0-16.0 g/L

        Clinical guidance

        Quantitation of serum concentration of IgG,IgA and IgM is essential in the diagnosis and management of primary and secondary immunodeficiencies. It is also necessary for monitoring of patients receiving Immunoglubulin replacement therapy. https://labtestsonline.org.uk/tests/quantitative-immunoglobulins

        Notes

        Images to go here

        This information was last updated on 19 August 2026