Abstract
This experiment was carried out on the experimental station–of the College of Veterinary MedicineUniversity of Mosul .Two hundred eggs chosen from 32 weeks old, meat type (Cobb) breeder hens and were classified into four weight classes ;group one (45-50)g; group two(51-56)g ;group three(57-62)g ;group four(63-68)g .Hatchability traits and subsequent chicks performance were studied as a result of different egg groups .The results of hatchability indicated that smaller eggs (45-50)g had a significant (p
