Estriol, Unconjugated (uE3)

Preferred Specimen(s) 1.0 mL Serum

Transport Container Plastic screw cap vial

Transport Temperature

Ambient 7 days,
Refrigerated 7 days

Reject Criteria

Grossly hemolyzed,
lipemic specimens

Methodology Chemiluminescence

Clinical Significance Much of Estradiol is bound to proteins. The unbound portion and Estradiol bound to proteins with low affinity reflect the free concentration. The Free Estradiol may better correlate with medical conditions than the Total Estradiol concentrations.