Answers are grounded in this paper and cite their sources.
Summary. The removal of follicular cells decreased the proportion of mouse eggs penetrated by epididymal spermatozoa, but did not affect the proportion of hamster eggs penetrated, whether the spermatozoa were taken from the epididymis or from the uterus.
No takes yet. Share an insight, caveat, or question.
MIYAMOTO et al. (1972) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: