التنظيم الهرموني للتكاثر سنة ثالثة ليسانس بيولوجيا وفيسيولوجيا الحيوان

Abstract

The development and function of the reproductive system are regulated by hormones and require coordination between peripheral organs and the nervous system to create an optimal environment for successful reproduction. The hypothalamus secretes gonadotropin-releasing hormone (GnRH), which stimulates the pituitary gland to release follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The release of these two hormones into the bloodstream stimulates target cells (gonads) to secrete sex hormones, which act indirectly on target organs by binding to their specific receptors. Their secretion is thus regulated by the hypothalamic-pituitary axis (a reflex mechanism). In men, this axis regulates testicular activity from puberty to death, and in women from puberty to menopause.