Mondo Knows Facts
A double yolk comes from two ovulations close together
Two yolks are released before the shell forms around them
A double-yolked egg happens when a hen releases two yolks in quick succession and the shell gland wraps them in a single shell. Young hens coming into lay, and heavy breeds, produce them more often. The trait is partly heritable, which is why some flocks lay them regularly and others almost never do.
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Tags: eggs, poultry
A double yolk comes from two ovulations close together: the short answers
- Where does this come from, and can I check it?
- Two yolks are released before the shell forms around them. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
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- Yes. It sits on the Food shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
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