The present experiment was conducted to study the effect of dietary supplementation with carotenoids- enriched Spirulina platensis algae (SA), flock age on egg weight loss% ,embryonic weight and mortalities %, hatching traits and blood constituent of Bandarah chicks. One hundred and thirty five females with fifteen males from Bandarah chicken strain at 30-week of age (YA) besides the same numbers at 56-week of age (OA) were housed in floor pens. Five experimental bird groups for each age were fed as follows : basal diet without supplementation of SA (T1) , basal diets supplemented with 40 mg (T2), 80 mg (T3), 120 mg (T4) , 160 mg (T5) SA / Kg diet. The obtained results showed that eggs of elder flock significantly lost greater percentage of weight compared to the younger one. Elder flock age had greater (p≤0.05) embryonic mortality percentage compared with those for younger one and supplementation the diet with SA reduced embryonic mortality. Supplementation the diets with 40 mg for younger flock or 160 mg SA/Kg diet for elder flock , represented significant improvement of macroscopic fertility, hatchability of fertile eggs and hatched chick body weight. Lowest concentrations(p≤0.05) of -carotene and Zeaxanthin were detected in the liver of control chicks compared to those for all other groups. The elder flock represented significantly higher Zeaxanthin carotenoid concentration in the chick liver compared to those for younger one. Irrespective to flock age, baby chicks of T2 and T5 groups represented the highest significant values of total antioxidants and lowest LDL compared with the others. Regarding flock age, chicks produced from elder flock had higher significant values of cholesterol, LDL and malondialdhide, while chicks produced from younger one had higher values (p≤0.05) of total antioxidants and HDL. In conclusion, supplementing the diet of parental younger flock age with 40 mg SA/Kg diet and 160 mg SA/Kg diet for the elder one could be a good tool for realizing the best improvement results of fertility, hatchability and hatched chick body weight, besides highest concentration of total antioxidants in the blood of hatched chicks.