Lipid Metabolism in the Chick Embryo of the Domestic Fowl(Gallus domesticus)

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Abstract
The transfer of lipid that occurs from yolk to embryo during the last week of development of the chicken is associated with some notable changes in the lipid compositions of the embryonic tissues. Recent investigation of the accumulation and synthesis of some major lipid classes within the yolk and embryo has enabled an interpretation to be made of several changes. A central role for the yolk sac membrane in these major lipid metabolic changes was suggested. As a result of distinctive changes to the lipid patterns during normal embryonic development, it was suggested that the low hatchability and high mortality observed in eggs from young hens may have been associated with an inability to mobilize and assimilate yolk lipid reserves adequately.