The Mouse Adult Gross Anatomy Ontology and Mammalian Phenotype Ontology are downloaded weekly from the Mouse Genome Informatics databases at Jackson Laboratories (ftp://ftp.informatics.jax.org/pub/reports/index.html). For more information about these ontologies, see the MGI Publications Page at http://www.informatics.jax.org/mgihome/other/publications.shtml.
loss or reduction of the hyperactivated type of sperm mobility, impairing the ability of sperm to reach the site of fertilization and to penetrate the oocyte vestments; a block in hyperactivated motility may also impair the ability of a sperm to fertilize an oocyte in vitro