Avian Hormonal Control of Testicular Function - Anatomy & Physiology

• Testes under the influence of FSH and LH.
• Leydig cells produce Testosterone and Androstenedione under the influence of LH.
  • Provide secondary sex characteristics:
    • Coloration
    • Song during courtship
    • Comb growth.
    • Plumage and Bill colour
  • Testosterone increases spermatogenesis and growth of accessory reproductive organs.
• FSH initiates growth of semniferous tubules and results in increased spermatogenesis.