I've had fertile developing eggs develop fungus and still hatch out perfectly healthy; I've also had infertile eggs go 10 weeks, yes, you read this right, 10 weeks without any development at all (they candled clear through) and still look perfectly healthy white, plump, showing no mold/fungus, bad smells nor sweating.



The key in determining egg viability is whether or not you see any development within the first week by candling; if not, the chances are probably good that it's infertile. I've had eggs show development within 24 hours, I've had some go as long as a week before any development could be detected, the average has always been between 48-72 hours though. All other indications of egg viability/non-viablility are conditional and not necessarily going to determine whether an egg is going to hatch or not, it's all dependent on healthy embryonic development (or lack thereof).
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Troy Rexroth

Rextiles

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