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Why do some egg yolks have blood spots?

A yolk membrane can pick up blood spots as it travels down the hen's reproductive tract before the surrounding albumen (egg white) and shell have been formed. If the tract is bleeding, some of the blood can attach itself to the yolk. The blood spots are harmless blemishes and, contrary to some food books, do not indicate fertilization.

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09:52:19 on 01/29/08 by Webmaster - Questions and Answers -