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Commercial Hubbard classic broiler breeder flocks , with more than 85 years of experience in selecting the best genetics for the broiler industry, provides solutions that focus on the economic performance, health and well-being of breeding stock.The mean purpose of poultry breeder's farms is to produce an optimum number of fertile eggs; both male and female are important for achieving reproductive success. Reproductive performance of breeder flocks is influenced by various nutritional, physiological and environmental factors.Therefore, the objectives of this research were to investigate the effect of some nutritional and environmental factors affecting productive performance of broiler breeder under Egyptian conditions.in addition, study effects of supplementing Betaine, enzyme mixture or L-carnitine to the plant diets on the growth performance and economic analysis of broiler chickens.