This isn’t a amazing accident or a trick. But it is actual rare.
The abstruse appellation for the action of a craven incubating an egg central addition egg is alleged a counter-peristalsis contraction. Basically, an egg that wasn’t absolutely accessible went aback up central the hen’s changeable accumulation band and addition egg formed about it. This is what a chicken’s oviduct looks like:
Under accustomed circumstances, a hen ovulates and releases an oocyte that campaign through the oviduct basic the yoke. It collects layers of membranes and albumen forth its way through the changeable clue and develops its white. Finally, it forms the carapace in the uterus.
But in attenuate circumstances, addition ovulation occurs afore the aboriginal egg is absolutely formed and the aboriginal egg is sucked aback up into the alpha date of the oviduct. This additional egg forms itself through through the accepted action and aloof makes allowance to abbreviate the aboriginal egg. Next affair you know, a actual ample egg is pushed through the cloaca.
The YouTuber that uploaded this video writes that his hen is accomplished but they were abashed to eat the egg. For the record, if this already in a lifetime accident happens to you, both eggs should be normal.
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