OVER THE LAST FEW DECADES THERE HAS BEEN AN INCREASING DEMAND FOR POULTRY MEAT AS A GOOD PROTEIN SOURCE IN THE DIET. TO MEET THIS DEMAND THE POULTRY INDUSTRY INITIATED SEVERAL STRATEGIES TO INCREASE BROILER MEAT PRODUCTION. ONE AMONG THEM WAS THE INCLUSION OF ANTIBIOTICS IN THE BROILER DIET. IN EFFECT USE OF ANTIBIOTICS AS GROWTH PROMOTERS (AGPS) HELPED IMPROVE BIRD HEALTH GROWTH AND PERFORMANCE. HOWEVER USE OF ANTIBIOTICS AS FEED ADDITIVES LED TO CONCERNS OF ANTIBIOTIC RESISTANT PATHOGENS AND THEIR IMPLICATIONS TO HUMAN HEALTH. CONSEQUENTLY THE FDA HAS CURBED THE USE OF AGPS IN FOOD ANIMALS INCLUDING POULTRY. THIS RESTRICTION LED TO PROBLEMS WITH PERFORMANCE INCREASED PRODUCTION COSTS AND RISE IN DISEASES IN POULTRY. THEREFORE THERE IS A NEED TO DEVELOP EFFECTIVE ALTERNATIVES TO HELP PROMOTE HEALTH AND PERFORMANCE IN BROILERS. AMONG THE DIFFERENT ALTERNATIVES TESTED FEEDING PROBIOTICS TO CHICKENS WAS SHOWN TO IMPROVE BODY WEIGHT GAIN AND FEED CONVERSION RATIO IN CHICKENS. IN MODERN-DAY BROILERS THE PERIOD OF EMBRYONIC GROWTH ACCOUNTS FOR ALMOST HALF OF THE LIFESPAN. ALSO THIS PERIOD OF DEVELOPMENT IS CRITICAL TO CHICK PERFORMANCE FOLLOWING HATCH. HENCE ANY APPROACH THAT CAN SUPPORT AND PROMOTE EMBRYO GROWTH IS EXPECTED TO HAVE A POSITIVE IMPACT ON PERFORMANCE IN BROILERS. SPECIFICALLY THIS STUDY WILL APPLY PROBIOTICS ON EGGS AND STUDY THEIR EFFECT ON EMBRYONIC GROWTH AND PERFORMANCE IN BROILERS. ADDITIONALLY THIS STUDY WILL FOCUS ON MUSCLE GROWTH SINCE MUSCLE MASS IS DIRECTLY RELATED TO MEAT PRODUCTION. IT IS EXPECTED THAT THIS STUDY WILL HELP DEMONSTRATE THE POTENTIAL FOR TARGETING BROILER EMBRYOS TO IMPROVE PRODUCTION IN THESE BIRDS. OVERALL USE OF PROBIOTICS TO IMPROVE GROWTH AND THEIR APPLICATION ON EGGS MAY SERVE AS A NOVEL AND EFFECTIVE STRATEGY FOR RAISING BROILERS IN LIGHT OF THE AGP BAN.