The Atlas FSH ELISA Kit allows quantitative measurement of follicle-stimulating hormone (FSH) in human serum. FSH, a key gonadotropin, regulates ovarian follicle development in women and spermatogenesis in men. Measurement of FSH supports the diagnosis and monitoring of reproductive and endocrine disorders, including menstrual irregularities, polycystic ovary syndrome, menopause, and male infertility.