Process of Oogenesis

Brief overview of the process of Oogensis using a flowchart. Pink boxes are key points/terms and are meant to jog your memory, these are connected in chronological order to the next pink box. The white boxes linking them go into more detail about the steps inbetween the next box.

  • Created by: Tristan27
  • Created on: 23-01-19 17:40
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  • OOGENESIS: The development of female gametes.
    • Germinal epithelial cell
      • These divide by mitosis to create more epithelial cells and primary oocytes.
      • Primary oocytes [diploid]
        • These divide by mitosis to create more epithelial cells and primary oocytes.
        • The primary oocytes begin meiosis (I) but stop before birth.
          • Puberty stimulates the primary oocytes to complete meiosis (I) before ovulation. It also stimulates the primary follicles to develop.
            • Graafian follicle
              • Ovum created
                • Corpus luteum (yellow body)
                • After fertilization, the Graafian follicle regresses if fertilisation did not occur.
                  • If fertilisation occurs, the Graafian follicle becomes the 'yellow body'.
                    • Corpus luteum (yellow body)
              • The Graafian follicle (secondary follicle) migrates to the surface of the ovary and bursts.
                • When the follicle bursts, it releases the secondary oocyte.
                  • The oocyte begins meiosis (II) but stop at metaphase (II), if it is fertilised it completes meiosis (II) and creates the ovum.
                    • Ovum created
                      • After fertilization, the Graafian follicle regresses if fertilisation did not occur.
                        • If fertilisation occurs, the Graafian follicle becomes the 'yellow body'.
          • Graafian follicle
            • The Graafian follicle (secondary follicle) migrates to the surface of the ovary and bursts.
              • When the follicle bursts, it releases the secondary oocyte.
                • The oocyte begins meiosis (II) but stop at metaphase (II), if it is fertilised it completes meiosis (II) and creates the ovum.

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