The origin and early differentiation of the egg chamber of Drosophila melanogaster.
D000818:Animals; D002454:Cell Differentiation; D002455:Cell Division; D004330:Drosophila / Q000166:cytology*; D005260:Female; D008648:Mesoderm; D008854:Microscopy, Electron; D008962:Models, Theoretical; D010063:Ovum / Q000166:cytology*