Luteinizing Hormone (LH), also known as Lutropin or Luveris, is an endogenous hormone produced by the anterior pituitary gland. It belongs to the glycoprotein hormone family and plays a crucial role in the reproductive system. LH is composed of two subunits, alpha and beta, with the beta subunit conferring its biological specificity. Researchers have extensively studied LH for its role in regulating reproductive processes. The primary physiological roles of LH include stimulating ovulation in females and testosterone production in males. It is a key hormone in the menstrual cycle and is often measured in clinical settings to assess reproductive health. Research areas include its role in fertility treatments and its potential implications in reproductive disorders. LH acts by binding to the luteinizing hormone receptor (LHR), a G protein-coupled receptor located on the surface of target cells in the ovaries and testes. This interaction triggers a cascade of intracellular events, primarily through the cAMP signaling pathway, leading to steroidogenesis and ovulation. The pharmacokinetic properties of LH include a circulating half-life of approximately 20 to 30 minutes. It is metabolized primarily in the liver and kidneys, with its bioavailability varying depending on the route of administration. In clinical use, LH is often administered in combination with other hormones for fertility treatments. It is approved by regulatory agencies for specific indications related to reproductive health, with its use guided by clinical protocols.