Abstract
In addition to normal spermatozoa, spermatozoa with bent and coiled tails, as well fragments of spermatozoa, such as single heads and tails and complexes of heads and tails, were found in a suspension of epididymal spermatozoa obtained from mice kept in the state of sexual deprivation for a long time. The dynamics of these elements was traced in the suspensions maintained at 10 and 35°C. At 37°C, the numbers of normal spermatozoa and spermatozoa with bent tails significantly decreased, while that of spermatozoa with coiled tails remained unchanged. At 10°C, the number of only spermatozoa with bent tails decreased. Based on the published data and our results, we propose that spermatozoa unclaimed for fertilization not only disintegrate into characteristic fragments, but also undergo a sequence of forms characteristic for the haploid phase of multicellular organism life cycle.
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