Here Is A Brief Overview Of The Phases Of The Menstrual Cycle
The menstrual cycle prepares the ovaries for ovulation and the endometrium (uterine lining) for implantation of the fertilized egg (ovum). NCRM recommends that you closely monitor your menstrual cycle when trying to conceive.
Follicular Development
Every 28 days or so, new follicles (clusters of cells that each enclose a developing egg) begin to grow inside the ovaries. Usually just one follicle fully matures and ovulates. The empty follicle becomes the corpus luteum, which secretes large quantities of progesterone and estrogen. If no pregnancy takes place, then the corpus luteum begins to degenerate, hormonal secretion declines and menstruation begins.
Endometrial Development
Here are the phases and the activities during endometrial development:
- Menstruation – The surface of the endometrium sheds off resulting in menses.
- Proliferative phase (Follicular Phase): Endometrial cells proliferate and the lining thickens
- Secretory phase (Luteal Phase): An egg is expelled from the ovary (ovulation) into the pelvic cavity.
- Premenstrual phase The endometrium continues to mature until a sudden drop in hormone levels triggers menstruation.
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