FSHR, or Follicle-Stimulating Hormone Receptor, is a receptor protein mainly found on ovarian granulosa cells in females and Sertoli cells in males. It plays a crucial role in reproductive function by mediating the effects of follicle-stimulating hormone (FSH), which is secreted by the anterior pituitary gland. FSHR is vital for processes such as folliculogenesis—the growth and maturation of ovarian follicles in females—by activating signaling pathways that encourage cell growth and development.