How old/big are the male/males? How long were they out of brumation? And did you put them together at all in between the 1st introduction.

Putting them together early shouldn't have mattered. The females are either ready or not. Putting them together at the right time is what matters. So, either your male wasn't ready or isn't fertile, or if you didn't put them together again, he never had the chance to breed her at the right time. The infertiles would be because he wasn't with them at the RIGHT time, not because he was with them too early.
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Brian Suter

www.serpenteer.com

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