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  • Title: Yolk sac utilization in ostrich (Struthio camelus) chicks.
    Author: Mushi EZ, Binta MG, Chabo RG.
    Journal: Onderstepoort J Vet Res; 2004 Sep; 71(3):247-9. PubMed ID: 15580775.
    Abstract:
    The mass of residual yolk sac expressed as a percentage of initial mass of the egg from which the chick hatched decreased sharply in the first 2 days post-hatching. A gradual reduction occurred between 3 and 10 days after which a sharp decline was noted between 11 and 13 days post-hatching. The highest number of chicks with unabsorbed yolk sac was noted on day 5 post-hatching followed by days 6 and 7. Chick mortality followed the same pattern. The dynamics, causes and clinical consequences of yolk sac utilization are discussed.
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