This assay is used for the in vitro quantitative detection of Follicle-Stimulating Hormone (FSH) in human serum and plasma. FSH, a glycoprotein with a molecular weight of about 32,000 Daltons, is secreted by basophils in the anterior pituitary and plays a key role in reproductive function. It promotes ovarian follicle development in women and spermatogenesis in men. In females, FSH levels fluctuate with the menstrual cycle and are involved in the regulation of the hypothalamic–pituitary–ovarian axis. Measuring FSH is important for assessing pituitary and ovarian function, predicting ovulation, diagnosing infertility, menopausal syndrome, and other endocrine disorders. Common testing methods include immunofluorescence and chemiluminescence.
