Biology · Reproduction
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Due to the process of follicle atresia:
- A
Follicles reach maximum size
- B
Follicle degenerates
- C
Graafian follicle ovulates
- D
The follicle starts to mature
The follicle that is not selected for ovulation begins to break down. The oocyte and surrounding granulosa cells undergo apoptosis (programmed cell death).
In follicle atresia, the follicles do not reach maximum size. Instead, atresia occurs when developing follicles begin to mature but fail to complete their growth and eventually degenerate.
The follicle that is not selected for ovulation begins to break down. The oocyte and surrounding granulosa cells undergo apoptosis (programmed cell death).
Triggered by a surge in luteinizing hormone (LH), the Graafian follicle ruptures, releasing the mature oocyte into the fallopian tube. This event occurs typically around the midpoint of the menstrual cycle.
The Graafian follicle is the dominant follicle that has reached full maturity during the menstrual cycle. It is characterized by a large size, a fluid-filled antrum, and a well-developed layer of granulosa cells surrounding the oocyte.
Tagged under Biology · Reproduction · 2024