1. Vitellogenin is the key factor in vitellogenesis in insects.

2. Vitellogenesis begin at this stage.

3. Vitellogenesis is regulated by hormones. There are obvious differences between hard ticks and soft ticks in hormonal effects and sorts.

4. Objective: To study The vitellogenesis and its mechanism in 2 kinds of lizards.

5. Vitellogenesis directly influences tick reproductive ability, and is always a very active research field in tick physiology.

6. At the end stage of vitellogenesis, Golgi complex began to disintegrate, so its number decreased.

7. The knowledge of tick vitellogenesis is preliminary, and further research should be made in many aspects.

8. To comprehensively concluded our results, it could be regarded that ecdysteroid play the main role in the regulation of vitellogenesis for the Japanese oak silkworm.

9. These histological structure changes of MO reach to the top at vitellogenesis stage.

10. The granulosa increasingly disintegrated and the yolk platelet came into being in the oocyte in vitellogenesis .

11. This thesis described the relationship of organelles in the oocyte with vitellogenesis in Macrobrachium rosenbergii.

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12. Besides, the role of yolk nucleus and nucleoli in the vitellogenesis, the spawning type and the spawning interval were discussed.

13. There were clear seasonal changes in the folliculogenesis. It could be divided into two stages:the previtellogenesis and vitellogenesis .

14. At present, the reproductive physiology of ticks has become one of the international focus research realms. Vitellogenesis and hormonal regulation are the essential contents of this realm.

15. The functions of the mitochondria and yolk precursor granules during vitellogenesis process are discussed in this paper.