The discharge, by sperm, of a single, anterior secretory granule following the sperm's attachment to the zona pellucida of the oocyte. The process begins with the fusion of the outer acrosomal membrane with the sperm plasma membrane and ends with the exocytosis of the acrosomal contents into the zona pellucida.
asexual reproduction +
centrosomal and pronuclear rotation
developmental process involved in reproduction +
egg activation +
embryo implantation +
female pronucleus assembly
fertilization +
fusion of sperm to egg plasma membrane involved in single fertilization +
male pronucleus assembly +
mating plug formation
meiotic cell cycle +
meiotic cell cycle process +
meiotic drive
multi-organism reproductive process +
multicellular organismal reproductive process +
negative regulation of reproductive process +
ovulation cycle process +
parasexual reproduction with cellular fusion
penetration of cumulus oophorus
penetration of zona pellucida
pollination +
positive regulation of flagellated sperm motility involved in capacitation