Standardization of FSH, LH and hCG--current position and future prospects

Area of Science:

• Clinical Chemistry
• Endocrinology
• Oncology

Background:

• Gonadotropin measurements are essential for patient management in endocrinology and oncology.
• Current assays exhibit significant variability due to differences in calibration, antibody specificities, and assay design.
• This lack of comparability complicates individual patient care, multicenter clinical trials, and guideline development.

Purpose of the Study:

• To highlight the critical need for improved comparability of gonadotropin measurements across different methods.
• To outline key strategies for enhancing the reliability and consistency of gonadotropin assay results.

Main Methods:

• The study emphasizes the need for clear nomenclature and accurate calibration using purified standards.
• It calls for careful characterization of measured gonadotropin isoforms and recommendations for antibody combinations.
• Awareness and management of clinically relevant interferences are also highlighted.

Main Results:

• Current gonadotropin assay results are not comparable across different methods.
• Problematic comparisons hinder individual patient care, clinical trials, and guideline formulation.
• Standardization efforts are essential for future progress.

Conclusions:

• Improved comparability of gonadotropin measurements requires standardized nomenclature, calibration, and method characterization.
• Addressing interferences and encouraging manufacturer transparency are vital steps.
• Standardized gonadotropin assays will enhance clinical decision-making and research reproducibility.