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It has been reported that acrosome reaction in rat spermatozoa does not occur before their pene-tration of cumulus oophorus and zona pellucida. This study was conducted to examine whether any morphological change in acrosome could be observed in rat spermatozoa recovered from uterus.<BR>Transmission and scanning electron microscopical observations showed that more than fifty percent of spermatozoa had partly or perfectly dispersed plasma membrane of acrosomal region when reco-vered from uterus 6 h after mating.<BR>The most spermatozoa recovered from uterus 12 h after mating, lost plasma membrane, which apparently led to release of acrosomal substances. The anterior region of sperm head swelled and extremely changed. In some spermatozoa, the nuclear membrane was partly dispersed.
- 日本繁殖生物学会の論文
日本繁殖生物学会 | 論文
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