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Glossary Term
Glossary Term Blastocyst
Definition A preimplantation mouse embryo consisting of 16-40 cells with a clearly apparent inner cell mass (Theiler Stage 3-4). See the Edinburgh Mouse Atlas for a table of staging criteria in mouse development, or for images of the stages.
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
03/25/2025
MGI 6.24 		The Jackson Laboratory