Human sperm chemotaxis: both the oocyte and its surrounding cumulus cells secrete sperm chemoattractants

Abstract

These observations suggest that sperm chemoattractants are secreted not only prior to ovulation within the follicle, as earlier studies have demonstrated, but also after oocyte maturation outside the follicle, and that there are two chemoattractant origins: the mature oocyte and the surrounding cumulus cells.