The mother germ cells are transformed into a mature follicle through series of steps. Provide the missing steps in the blank boxes.

1. Oogonia results in the formation of primary oocyte.This primary oocyte is surrounded by granulosa cells to form a primary follicle.

2. This primary follicle gets surrounded by more granulosa cells to form a secondary follicle.

3. The secondary follice gets converted to tertiary follicle by addition of more granulosa cells.

4. The primary oocyte within the tertiary follicle than undergoes meiotic division to form a secondary oocyte or ovum and a polar body.

5. The tertiary follicle matures to form graafian follicle.

6. The graafian follicle than ruptures to release the secondary occyte or ovum.

7. This process is known as Ovulation.