Fine Structural Observation on the Oogenesis and Vitellogenesis in Chinese Soft-shelled Turtle, Pelodiseus sinensis

Here we described the ovarian follicle using electron microscopy to examine the vitellogenesis pathway and the special function exerted by follicular cell during growing stage.Through the observation of vitellogenesis under the electron microscope,we found some of the mitochondria(Mt)transform into the yolk granulae gradually.So in this stage,the pathway of vitellolgenesis is