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Phenotypes Associated with This Genotype
Genotype
MGI:3798388
cn1
Allelic
Composition		 Esr1tm1.2Mma/Esr1tm1.2Mma
Tg(Cga-cre)3Sac/0
Genetic
Background		 involves: 129S2/SvPas * C57BL/6 * C57BL/6J * SJL
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Esr1tm1.2Mma mutation (0 available); any Esr1 mutation (69 available)
Tg(Cga-cre)3Sac mutation (1 available)
♀ phenotype observed in females
♂ phenotype observed in males
N normal phenotype
reproductive system
ovarian follicular cyst ( J:131949 )
• occasionally follicular cysts are observed in mice
abnormal estrous cycle ( J:131949 )
• irregular cycling

endocrine/exocrine glands
ovarian follicular cyst ( J:131949 )
• occasionally follicular cysts are observed in mice

growth/size/body
ovarian follicular cyst ( J:131949 )
• occasionally follicular cysts are observed in mice

Contributing Projects:
Mouse Genome Database (MGD), Gene Expression Database (GXD), Mouse Models of Human Cancer database (MMHCdb) (formerly Mouse Tumor Biology (MTB)), Gene Ontology (GO)
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Send questions and comments to User Support. 		last database update
01/06/2026
MGI 6.24 		The Jackson Laboratory