Sommaire : 1. Role of the nervous system in reproduction. 2. Gonadotropins. 3. Biochemistry and physiology of the gonadal hormones. 4. Folliculogenesis. 5. Spermatogenesis. 6. Male reproductive organs and semen. 7. Artificial insemination. 8. Fertilization, early development, and embryo transfer. 9. The development of the conceptus and its relationship to the uterus. 10. Hormonal mechanisms in pregnancy and parturition. 11. Mammary gland development lactation. 12. Reproduction in horses. 13. Reproduction in cattle. 14 reproduction in the pig. 15. Reproduction in the sheep and goat. 16. Reproduction in the dog and cat. 17. Reproduction in poultry. 18. Nutritional influences on reproduction. 19. Genetic variation and improvement in reproduction. 20. Influence of infectious diseases on reproduction