Used in biomedical research to measure the concentration of follistatin in rat samples. Helps in studying reproductive physiology, ovarian function, and pituitary hormone regulation. Commonly applied in endocrinology studies to understand the role of follistatin in modulating activin and follicle-stimulating hormone levels. Also useful in research related to muscle development, inflammation, and metabolic disorders in rat models. Enables high-throughput, accurate quantification in serum, plasma, and cell culture supernatants.