A New Instant Cryoprotectant for Human Sperm

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Abstract
A new instant cryoprotectant, mainly containing culture medium, human serum albumin, and kallikrein, and its laboratory handling in the cryoprotection of semen are described. A comparative study distributed to three cryobiological centers using either egg yolk citrate medium or instant cryoprotectant showed that neither had a significantly better or worse mean percentage recovery rate. The advantage of the new instant cryoprotectant presented consists clinically in the absence of egg yolk and technically in its easy handling. Therefore, ICP is judged as an alternative to ECM in the cryopreservation of human sperm.