Male chicks hatched from eggs heavier than 60 g weighed more (P less than 0-05) than female chicks from eggs of similar weight. 2. The weight of the residual yolk was similar in both sexes. 3. It is concluded that male embryos are better able to utilise the energy supplies in the egg, particularly after the 18th day of incubation.
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Khan et al. (1975) studied this question.
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