substage of immediately preceded by oogenesis developmental stage oogenesis stage S9 oogenesis stage S10 FBdv:00005270 Oogenesis stage that begins when all the oocyte associated follicular epithelium is columnar and all of the nurse cell associated follicular epithelium is completely squamous and ends with the beginning of nurse cell dumping. Temporal ordering number - 10100. FlyBase_development_CV