1. Hypothalamus releases Gonadotropin-releasing hormone (GnRH)2.
GnRH causes the pituitary gland to produce FSH. FSH reaches the
ovaries via the blood stream. FSH causes the follicles to mature.
Follicles are little balloon
like sacs filled with cells and fluid and hold an egg. Each
follicle contains one single egg.
3. Maturing follicles produce estrogen. Estrogen signals the
brain, which slows down the FSH production and starts LH production
in pituitary glands.4. Estrogen also prepares the uterus for
ovulation by thickening the blood vessels lining the uterus.5.
Estrogen production boosts LH.6. LH surges and causes ovulation.
The egg escapes, travels via the fallopian tube and goes to the
Uterus.
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7. The empty follicle from which the egg was released is called
as Corpus Luteum or yellow body. The Corpus Luteum produces
Progesterone. Progesteronesignals the brain to stop producing
LH.
8. Progesterone also prepares the uterus by thickening the
uterus lining and also producing mucus to ease the passage of the
sperm. The egg sits and waits for24-48 hrs.
9. If you get pregnant, the hCG hormone is produced by the
developing embryo. This hormone signals the Corpus Luteum to keep
making Progesterone andEstrogen.If you dont get pregnant, the
corpus luteum disintegrates (called as Corpus Albican) and stops
producing Progesterone and Estrogen. The lowlevels of Progesterone
and Estrogen causes menstruation to occur.
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