The ovaries are one amazing set of organs, I have learned in the few weeks following my
Dx. Both reproductive and endocrine - you might call them the command center for the hormonal workings of the female body. Before you can understand anything about premature ovarian failure, you need to understand exactly how the female reproductive and endocrine systems work.
Short versionUterus builds up
endometrium (lining) in anticipation of release of egg. Ovary releases egg. If sperm is in wait, egg should fertilize. The fertilized egg travels down the fallopian tube to the uterus and implants in the
endometrium. Cue: pregnancy. If there is no sperm to fertilize the egg, then the egg and
endometrium are flushed out in that lovely process known as menstruation. And then the whole process starts over again.
For the visual learnersA Hormonal PrimerLet's take a look at exactly what's happening hormonally during a woman's cycle.
If you've ever wondered why some women might get a little "moody" during their cycle, well, we've got a LOT going on at once hormonally in our bodies :)
Follicular (Pre-Ovulatory) Phase
The pituitary gland begins releasing
FSH (Follicle Stimulating Hormone). This primes the ovary to start maturing its follicles, the individual part of the ovary that releases the eggs. During this phase, several follicles actually develop at once, on both ovaries, but only one follicle will mature and release an egg in most normal circumstances.
Estradiol (estrogen) is released by the
ovaries during this time, and aids in the building of the
endometrial lining of the uterus.
Ovulatory PhaseAs estrogen levels peak, it triggers the release of
LH (
Lutenizing Hormone) by the pituitary gland. Of all the developing follicles, one will mature and burst, releasing the egg. It is currently unknown how the body determines which of these follicles on which ovary will release an egg. The ruptured follicle then becomes the
corpus luteum (Latin for "yellow body"), and begins to release
progesterone. Progesterone is a heat-releasing hormone, and causes a woman's
BBT (Basal Body Temperature) to rise. It's also responsible for hot flashes. Progesterone is essential to ensuring implantation of the fertilized egg and to sustain pregnancy. If the egg is fertilized, it will take about 7-10 days to implant in the uterus. Once implanted, the fertilized egg will begin to release the hormone
hGC (Human
Chorionic Gonadotropin). This is the hormone that
POAS HPTs (pee-on-a-stick home pregnancy tests) are designed to detect. The corpus
luteum will continue to release progesterone, until the placenta develops and takes over progesterone production for the duration of the pregnancy.
Luteal PhaseIf the egg is not fertilized, the corpus
luteum will begin to
disintergrate, and thus, decrease the amount of progesterone released. The drop in progesterone causes a second rise in estrogen, which then triggers the uterus to shed the
endometrium, inducing a woman's menses. And then it starts all over again.
What does this all mean for me?Well, my remaining ovary isn't working anymore for some presently unknown reason, so NONE of this is happening in my body right now.