Can anyone try to simplify the female reproductive system for me?
I just keep getting confused as to what the LH does and what the FSH does and with all the different processes
This is how I see it:
it starts with the FSH which promotes the development of the follical.. the follical then produces estrogen which will trigger the release of LH..LH will then trigger ovulation and the ovum is released from the ovary.. at this point, LH induces the development of the corpus luteum which secretes progesterone and estrogen..the uterus wall thickens and is ready for implantation and if no implantation occurs,then the uterus sheds its lining and this is the menstrual period...If the egg gets fertilized then it goes through three stages, 1- Morula 2-Blastula 3-gastrula and this is when the 3 germ layers are developing......
Spermatogenesis and Oogenesis: Both start before birth when cells start to differentiate. females have all their primary oocyte before birth but males can keep making more primary oocytes through mitosis ....females produce viable eggs only after puberty.... Meiosis 1 starts after puberty for males and meiosis one ends before birth in the females... Meiosis 2 occurs after puberty and until death in males...... Meiosis 2 occurs only during fertilization in females ........the result is 4 haploid sperm cells for males and 1 haploid ovum for females
am I correct?
Can anyone try to simplify the female reproductive system for me?
I just keep getting confused as to what the LH does and what the FSH does and with all the different processes
This is how I see it:
it starts with the FSH which promotes the development of the follical.. the follical then produces estrogen which will trigger the release of LH..LH will then trigger ovulation and the ovum is released from the ovary.. at this point, LH induces the development of the corpus luteum which secretes progesterone and estrogen..the uterus wall thickens and is ready for implantation and if no implantation occurs,then the uterus sheds its lining and this is the menstrual period...If the egg gets fertilized then it goes through three stages, 1- Morula 2-Blastula 3-gastrula and this is when the 3 germ layers are developing......
Spermatogenesis and Oogenesis: Both start before birth when cells start to differentiate. females have all their primary oocyte before birth but males can keep making more primary oocytes through mitosis ....females produce viable eggs only after puberty.... Meiosis 1 starts after puberty for males and meiosis one ends before birth in the females... Meiosis 2 occurs after puberty and until death in males...... Meiosis 2 occurs only during fertilization in females ........the result is 4 haploid sperm cells for males and 1 haploid ovum for females
am I correct?
GnRH stimulates the release of LH and FSH.
LH and FSH stimulate:
1) oocyte development ....follicles grow (Day 1)
2) estrogen release from the ovaries.
-Estrogen stimulates uterine lining development, making it thicker.
-Rising levels of estrogen inhibit both LH and FSH. But when estrogen levels get VERY high (~ Day12), suddenly the negative feedback is reversed, there's a positive feedback in the hypothalamus and you see an increase in both LH (large amounts) and FSH levels.
-This increase in LH level (reaches its peak ~Day 14) triggers ovulation (mature follicle ruptures and moves from ovaries to fallopian tube). [you're right this is where the egg becomes haploid, one leaves the ovary, the other half remains].
-The residual follicle stays in the ovary, turns into corpus luteum which ends up secreting estrogen and progesterone.
-These hormones again maintain the uterine wall (preparing it in case there is gonna be implantation ) for the next two weeks (i.e. up until Day 28), and also start inhibiting LH and FSH.
-With the decline of LH, corpus luteum degenerates --> stops secreting estrogen and progesterone --> uterine wall crumbles and is sloughed off --> menstruation (~Day 28)
It's my understanding that both LH and FSH stimulate the growth (maturation) of follicles, and tell ovaries to release estrogen and progesterone
LH also triggers rupture (ovulation), and maintains corpus luteum.
If implantation occurs, hCG will take over LH's role of maintaing corpus luteum, who will keep producing estrogen and progestrone, who will in tunrn inhibit LH and FSH....which is why during pregnancy LH and FSH are kept low.
I hope that made sense!
