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This study evaluates the effects of storage periods (1, 4, 7, 10, and 13 days), egg size (small 60–64 g, medium 65–69 g, and large ≥ 70 g), and egg positioning with air cell facing either down or up during storage on hatchability percentages and day-old chick’s weight. One thousand and five hundred (1500) fertile eggs from Arbor acre broiler breed were purchased and arranged each according to egg sizes into five (5) different storage periods of 100 eggs per storage period. Each storage period was subdivided into 2 groups of 50 eggs each based on positioning during storage. A completely randomized design in 3 × 5 × 2 factorial arrangement was adopted. Stored eggs were incubated for hatch with recording of weights of the hatched chicks, and the hatchability rate was calculated. The results indicated eggs stored for a day and 4 days had maximum hatchability, but declined slightly as the storage period increased (92 to 78%). The eggs positioned down generally had better hatchability. However, medium-sized eggs had the highest hatchability percentage. On the other hand, large-sized eggs stored for longer period attained higher chick weight compared to medium- and small-sized eggs, but large-sized eggs positioned down gave a better chick weight. Generally, eggs stored with air cell down present superior chick weight. Storage period and egg positioning during storage affect the subsequent egg hatchability and weight of the hatched chicks from different egg sizes. However, egg storage must not exceed 4 days for optimum hatchability and weight of the hatched chicks. In addition, storing of eggs with air cell down might also enhance the hatchability and weight of hatched chicks irrespective of the weight of the eggs.

Effects of storage periods and positioning during storage on hatchability and weight of the hatched chicks from different egg sizes