Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
EstraNM_00795610090ERa    ESR    Estr    ER[a]    Nr3a1    ERalpha    Esr1   
EstraAF12822010090
EstraAF12822110090

Search Again
* OMIM link based on symbol match for human and mouse.

Google

Text2Knowledge ... Yong Huang 2002