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ENGLISH ABSTRACT
JOURNAL ARTICLE
[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 < 1×10⁶/ml, n = 54) and B (1×10⁶/ml ≤ sperm concentration < 5×10⁶/ml, n = 28), and the latter included in group C (sperm concentration < 15×106 /ml, n = 24). The survival rate of post-thaw sperm and recovery rate of progressively motile sperm (PMS) were compared among the three groups.
RESULTS: The survival rate of post-thaw sperm was significantly higher in groups A and B than in C ([62.8 ± 18.7]% and [61.9 ± 17.2]% vs [50.7 ± 13.5]%, P < 0.05), and so was the recovery rate of PMS ([68.7 ± 18.4]% and [70.7 ± 15.5]% vs [29.2 ± 12.4]% , P < 0.05), but there were no statistically significant differences between groups A and B in either of the two parameters (P > 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.
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 < 1×10⁶/ml, n = 54) and B (1×10⁶/ml ≤ sperm concentration < 5×10⁶/ml, n = 28), and the latter included in group C (sperm concentration < 15×106 /ml, n = 24). The survival rate of post-thaw sperm and recovery rate of progressively motile sperm (PMS) were compared among the three groups.
RESULTS: The survival rate of post-thaw sperm was significantly higher in groups A and B than in C ([62.8 ± 18.7]% and [61.9 ± 17.2]% vs [50.7 ± 13.5]%, P < 0.05), and so was the recovery rate of PMS ([68.7 ± 18.4]% and [70.7 ± 15.5]% vs [29.2 ± 12.4]% , P < 0.05), but there were no statistically significant differences between groups A and B in either of the two parameters (P > 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.
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