Abstract
Two experiments were performed to determine if age at first egg, age at production of first fertile egg, and age at production of first egg hatching a viable chick were different traits in pullets and to determine effects of chronological ages upon hatchability. Pullets were exposed to mature males at 17 weeks of age. Results indicated that the first egg was fertile, but a significant amount of time was required after maturity for the pullets to produce an egg which would hatch a viable chick. Hatchability increased with chronological age, reached a maximum in the 6th week after maturity, and was little affected by age at first egg in any given time interval.
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