The viability of hamster spermatozoa stored in the isthmus of the oviduct: the importance of sperm-epithelium contact for sperm survival.


When hamsters mate shortly after the onset of estrus, spermatozoa are stored in the lower oviduct (isthmus) during the preovulatory period. The present study was performed to determine what proportion of the spermatozoa in the isthmus survive until fertilization. Females were mated 5 to 6.5 h before ovulation. When spermatozoa in the isthmus were observed… (More)


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