substage of immediately preceded by oogenesis developmental stage oogenesis stage S13 oogenesis stage S13D oogenesis stage S14 Temporal ordering number - 10260. FlyBase_development_CV The last stage of oogenesis. This stage begins when no nurse cell nuclei remain at the anterior of the egg (chamber). Exochorion formation and secretion occurs during this stage. The dorsal appendages complete their elongation and the follicle cells die. FBdv:00005283