Advantages of cryopreservation technology for rare human sperm

Objective To search for an effective method for cryopreservation of rare human sperm (RHS) by comparing the effect of RHS cryopreservation technology with that of conventional cryopreservation technology on post-thaw sperm from patients with severe oligozoospermia. METHODS Semen samples obtained from 82 patients with severe oligozoospermia were preserved by RHS cryopreservation technology, and another 24 samples cryopreserved by conventional technology, the former divided into groups A (sperm concentration 0.05). CONCLUSIONS The cryopreservation technology for rare human sperm may yield relatively stable post-thaw results and deserves a wide clinical application in preserving male fertility.