Abstract
The present results were carried out at the Department of Poultry and Fish Production, Faculty of Agriculture, Shebin El-kom, Menoufia University, Egypt. The experiment was extended from March, 2018 to July,2019, in order to study the relation between different immune response concentration groups of Norfa chickens and reproductive female hormones (FSH and LH ), and their relation with some productive performance in Norfa chickens . The high immunity group of chickens had significantly higher percentages of fertility, hatchability, livability, early age at sexual maturity, and higher egg production traits either at 90 day of laying or at 42-Wk of age, as compared to control and low immunity groups of chickens .
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