Overview: Sex Hormone-Binding Globulin TestIntroduction: The Sex Hormone-Binding Globulin Test measures SHBG to diagnose hormonal imbalances, causing infertility or fatigue. Following 2023 Endocrine Society guidelines, it uses biochemical methods for high specificity, supporting hormonal screening. This test is critical for guiding diagnosis, treatment planning, and improving outcomes in endocrinology for patients with suspected hormonal disorders.
Other Names: SHBG Assay, Hormone-Binding Globulin Test.
FDA Status: Laboratory-developed test (LDT), meeting endocrinology standards for diagnostic accuracy.
Historical Milestone: SHBG testing began in the 1970s with hormonal research. Biochemical methods improved in the 2000s, enhancing diagnostic precision.
Purpose: Measures SHBG to diagnose hormonal imbalances, guides treatment, and evaluates patients with infertility or fatigue.
Test Parameters: 1. SHBG Level
Pretest Condition: Fasting for 10-12 hours required. Collect serum, plasma, or saliva. Report history of infertility, fatigue, or hormonal symptoms.
Specimen: Serum (SST, 2-5 mL), Plasma (EDTA, 2-4 mL), Saliva (sterile container, 1-2 mL). Transport in a biohazard container.
Sample Stability at Room Temperature: 8 hours
Sample Stability at Refrigeration: 7 days
Sample Stability at Frozen: 6 months
Medical History: Document infertility, fatigue, or history of hormonal disorders. Include current medications, especially hormonal therapies.
Consent: Written consent required, detailing the tests purpose, hormonal imbalance implications, and risks of sample collection.
Procedural Considerations: Uses enzyme-linked immunosorbent assay (ELISA) to measure SHBG levels. Results are available in 1-2 days, supporting clinical decisions. Performed in laboratories, often for hormonal disorder diagnosis.
Factors Affecting Result Accuracy: Improper fasting or sample hemolysis can affect results. Medications like oral contraceptives may alter SHBG levels.
Clinical Significance: Abnormal SHBG levels confirm hormonal imbalances, guiding hormone therapy or fertility treatments. Normal levels may require testosterone or estrogen testing.
Specialist Consultation: Consult an endocrinologist or reproductive specialist for result interpretation and treatment planning.
Additional Supporting Tests: Free testosterone, estradiol, or LH/FSH levels to confirm hormonal imbalance diagnosis.
Test Limitations: Non-specific for certain hormonal conditions; clinical correlation is needed. Sample quality affects sensitivity.
References: Endocrine Society Hormone Guidelines, 2023; Journal of Clinical Endocrinology, Rosner W, 2022.
