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.
anomaly in the process by which a highly vascularized extra-embryonic fetal membrane is formed by fusion of the chorion and allantois; in most mammals, the chorioallantois constitutes the fetal portion of the placenta