Submicroscopic differentiation of nucleolus during cleavage of rat ovum.
D000818:Animals; D001755:Blastocyst / Q000648:ultrastructure*; D002455:Cell Division; D002466:Cell Nucleolus / Q000648:ultrastructure; D005260:Female; D051381:Rats; D015053:Zygote / Q000648:ultrastructure*