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Patency is rapid following vasovasostomy but requires 12 or more months following vasoepididymostomy. Intervention for azoospermia is appropriate 6 months after vasovasostomy and 1 year after vasoepididymostomy. Intraoperative cryopreservation of sperm in men undergoing vasoepididymostomy and postoperatively in all men with motile sperm will maximize fertility options.
Matthews et al. (Fri,) studied this question.
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