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Volume 2, Issue 2 (June 2000) 2, 111–114;

Sperm function tests after vasovasostomy

R.Q. Wen, M.Y. Lie, P.L. Tian, N.Yang, Y.J. Jiang, A.P. Chen

Family Planning Research Institute of Guangdong, Guangzhou 510600, China

Advance online publication 1 June 2000


Aim: To evaluate the sperm function after vasovasostomy. Methods: Semen samples from 42 subjects after vasovasostomy (Group A: 1-6 months, Group B: 6-12 months; Group C: 12-18 months after vasectomy reversal) were investigated. Semen from 34 normal fertile men was used as controls. Sperm function tests, including hypo-osmotic swelling test (HOST), acridine orange (AO) fluorescence, acrosome reaction (triple-stain), cervical mucus penetration test (CMPT), etc were done. Results: After vasectomy reversal, the percentage of HOST was significantly lower than that of the normal fertile men. In regard to AO, there were no significant differences between the three vasovasostomy groups and between these 3 groups and the controls. With triple-stain, the percentage of normal acrosome reaction was significantly lower in Group A as compared with the controls, but not in Groups B and C. There were no significant differences in the results of CMPT between the vasovasostomy groups and the controls. However, the number of poor type was significantly higher in Groups A and C than in the controls; the percentage of negative type were higher in Groups A and B than in the controls. Conclusion: After vasovasostomy a lower level of HOST remained for one year and gradually recovered after one year. Six months after vasectomy reversal, the percentage of acrosome reaction could be changed from lower level to normal range. The data of AO indicated that the genetic material (double-stranded DNA) in spermatozoa was not affected by vasovasostomy. To evaluate the result of CMPT after vasectomy reversal, not only the normal results but also the abnormal results (poor and negative types) should also be considered.

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