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
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This information was last updated on 19 August 2026