name: premature acrosome loss
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def: "The discharge, by sperm, of a single, anterior secretory granule before the sperm reaches 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." [PMID:19153666, PMID:21380641, PMID:26655718]
comment: If the release of the acrosome content when the sperm reaches to the zona pellucida, consider using acrosome reaction.
synonym: "spontaneous acrosome loss" EXACT 
is_a: GO:0022414 ! reproductive process
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