Oogenesis:
When in the fetus, germ cells divide by mitosis and spread into the ovary's cortex
At 4 months, the cells grow divide by meiosis. This is the first meiosis division
At 7 months, follicle cells form around the cells, which are still undergoing the 1st meiosis devision
During the menstrual cycle, primary follicles begin to develop and the oocyte completes the 1st meiosis devision.
In a secondary follicle, the follicles multiply and a fluid-filled cavity is created. Now the oocyte begins the second meiosis division
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