Short Communication / Kisa Bilimsel Çalişma Gross appearance of the chicken unfertilized germinal disc

Summary: Flock fertility could be determined by different appearances of germinal disc in fresh egg. The aim of this study was to determine the differences and the frequency of distributions in the appearance of germinal disc in fresh unfertile eggs coming from a young virgin brown layer flock. In this study a total of 354 eggs was examined. Six categories of unfertile germinal disc (UGD) were defined based on their appearance as A, B, C, D, E and F. As a conclusion, in total eggs, type A (31.9%) was the highest and type C was the lowest (6.5%) in frequency.