Why dont sperm banks keep sperm warm like our bodies do rather than freezing it?
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Freezing it puts it into a sort of suspended animation and preserves it. If they kept it warm then they would live their natural very short life cycle as cells (about 5 days) and without testes resupply while in the bank it makes collecting it in the first place useless. Being stored warm also makes it more likely to be contaminated with atmospheric bacteria and fungi.
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