الفهرس 
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Abstract
This study was conducted to investigate the effect of both egg incubation system and meat chicks on the performance of chicks’ growth, carcass characteristics, some blood components, and economic efficiency. In this study, 900 eggs with an average broiler weight of 63.5 ± 1.2 g were collected from 42-week-old mothers. Randomly divided into: 6 groups in each one 150 eggs per group, each group was divided into 3 replicates (each 50 with an egg). Design a global experience (2 × 3), 2 egg incubation system (multi stage and single stage)and 3 meat-kittens (Cobb, Evian and Indian River) were incubated for 18 days. After hatching, 30 chicks were treated for each treatment for 35 days separately with the same design and arrangement. The most important results obtained were:
The chicks resulting from the single stage incubation system recorded the highest values of the living body weight, the acquired body weight, the feed consumption rate and the feed conversion rate during the experiment period compared to the chicks produced by the multi stage incubation system. The highest values of live body weight, body weight gain, feed consumption rate and feed conversion rate during the experiment period were also recorded in the avian chicks compared with the rest of the breeds. For blood samples there were no significant differences in most groups. The Avian strain was independent or intermittent with the single stage incubation system, which showed a significant increase in liver enzymes AST, ALT and the ratio between albumin and globulin compared to other groups. For the economic assessment, the chicks group resulting from the multi stage incubation system recorded higher net profit and economic efficiency than the single stage incubation system. The best group is the group of Evian chicks produced from the multi stage incubator system.