Used in biomedical research to quantitatively measure Activin A protein levels in human serum, plasma, and cell culture samples. Helps in studying reproductive health, inflammation, tissue repair, and endocrine disorders. Commonly applied in clinical labs and research settings to investigate roles of Activin A in pregnancy, cancer progression, and autoimmune diseases. Provides a reliable, sensitive, and high-throughput method for detecting changes in Activin A expression under various experimental or pathological conditions.