- No signal being sent to a your hypothalamus to release gonadotropin-releasing hormone (GnRH) -- the hormone responsible to begin the whole process of egg maturation.
- So, there is never a signal to the pituitary gland to produce the follicle stimulating hormone (FSH) -- the hormone that signals the growth of egg follicles in the ovaries.
- This means that nothing will trigger the luteinizing hormone (LH) surge -- necessary to activate the egg's release on your ovulation day.
So to Recap:
- The FSH signals the growth of egg follicles in the ovaries
- The LH triggers your ovulation day
- The ovary becomes relatively inactive without these hormones present
- Your ovulation day does not occur because no mature egg is produced or released.
The Bottom Line:
It basically comes down to the notion that hormonal birth control works by suppressing the two key hormones that are involved in your ovulation day: FSH and LH.
These two hormones begin to be produced when the body notices a shortage of estrogen and progesterone. Hormonal birth control provides just enough of these synthetic hormones to prevent the stimulation of FSH and LH production. Keeping estrogen and progesterone levels constant produces constant levels of FSH and LH, which keeps the egg from ripening and maturing -- thus the egg is never released, so your ovulation day does not occur.
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