I have no experience breeding them myself, but the females I've seen have successful litters have been in the 4 - 5 foot long class. Probably more to do with body weight than length though, all the people who I've talked to have emphasised the need for females to be really well fed and heavy before they breed as it takes a lot out of their metabolism.

It must be heartbreaking to have all the excitement and then a dead litter: better luck for the future,
Helen
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