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* Ultrasonic evaluation of the gonads or hemipenes is also possible.
 
* Ultrasonic evaluation of the gonads or hemipenes is also possible.
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==References==
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* Zug, George R.; Vitt, Laurie J. (2001). ''Herpetology : an introductory biology of amphibians and reptiles''. Academic Press. pp. 630. ISBN 012782622X
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