I did it a few years ago, hatched 10 out of 12, I think the two in the middle couldnt cut their way through the egg shell or something as they were fully formed and perfect. Female did fine BUT you must make sure that you feed her heavy the previous growing season so she has weight. It was an interesting "experiment".

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Cheers
Lateralis
"I would rather be precisely wrong than approximately right"
Marion "Doc" Ford