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Abstract
1. Storage of eggs for 14 d prior to incubation depressed hatch‐ability by 10%.
2. Most of the increase in embryonic mortality (64%) occurred during the first week of incubation, with a further 30% taking place during the third week.
3. Chicks hatching from stored eggs did not show any increased incidence of physical abnormalities characteristic of vitamin deficiencies.
4. Chicks from stored eggs showed haematological abnormalities characteristic of mild macrocytic anaemia. Such changes can result from deficiencies of folic acid or cobalamin.
5. Biochemical and haematological data did not suggest impairments in the status of the chicks with respect to a range of other vitamins.