Section 8
Chapter 7,994

Variability in sperm penetration rate in the hamster oocyte penetration test in healthy young men i

Miharu, N.

Japanese Journal of Fertility and Sterility 37(2): 23-28


Accession: 007993520

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In this study, the effect of frequent ejaculations on semen parameters and sperm penetration rate (SPR) in the hamster oocyte penetration test (hamster test) were examined. The subjects were three healthy young donors. Semen samples were collected at 24-hour intervals for 4 to 6 consecutive days (one series) after an initial abstinence of 3 to 4 days. Semen analysis (sperm concentration, sperm motility, and volume) and the hamster test were performed for four separate series in one donor and for two series in two donors. Semen parameters varied considerably within each series and no decline in parameters could be detected with time. The variation of SPR in the hamster test in a series (maximum SPR-minimum SPR) ranged from 14 to 22% (mean, 17.8%). No correlation was observed by analysis of variance, between any semen parameter or any combinations of semen parameters and SPR (p < 0.01). These results indicate that SPR in healthy young men is stable between consecutive samples over 4 to 6 days and is not influenced by frequent ejaculations or variations in semen parameters.

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