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LH

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FHS
Is realeased form the anterior pituitary gland and stimulates the development of the follicle in the ovary. Inhibited by LH and oestrogen.
LH
Is released from the pituitary gland and inhibits FSH. It stimulates ovulation and mesiosis in the ovum. It causes the digestion of the follicle wall allowing it to burst open, causing ovulation.
It promotes the development of the wall of th follicle after ovulation into the corpus luetum. It is then inbitied by oestrogen.
Oestrogen

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- The pituitary gland produces FSH which stimulates the development of follicles in the ovary, follicles produce oestrogen

- oestrogen is produced by the ovary and stimulates the repair of the uterus lining and stimulates the production of LH

- LH is produced by the pituitary gland which stimulates ovulation and the development of corpus luteum from the follicle after the release of ovum
- the corpus luteum secretes progesterone which stimulates the thickening of the uterine wall

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1. FSH produced by the pituitary gland stimulates the follicle development in the ovary
2. Follicles produce oestrogen which causes the thickening and the repair of the  uterus
3. LH is secreted by the pitutary gland stimulated by the oestrogen
4. LH causes ovulation, the release of the ovum from the follicle
5. The remains of the follicle will turn into the Corpus leteum which secretes progesterone and inhibits the release of FSH
6. progesterone released will thicken the lining of the uterus

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The anterior Pitutary Gland starts by secreting Follicle Stimulating Hormone (FSH)  which stimulates the development of follicle into a mature follicle.
The FSH also secretes estrogen which stimulates the thickening of the endometrium and also the secretion of LH from the pitutary gland.
LH would then cause ovulation, releasing the ovum. the mature follicle, after the release of ovum, become the corpus leutum which secretes progesterone which maintains the thickness of the uterine lining and also acts as negative feedback to inhibit the secretion of FSH. This prevents the development of another mature follicle.

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1. Anterior Pituitary Gland release Follicle Stimulating Hormone (FSH).
2. FSH stimulates the follicle to grow in the ovary --> Oestrogen is release to stimulate the LH.
3. LH is release from the Anterior Pituitary Gland, stimulates Ovulation
4. If fertile, it will implant but if not (infertile), it will come out as waste.
5. Oestrogen is released, the Endometrium decrease in thickness.

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- the release of FSH from the pituitary gland into the blood stream
-FSH stimulates the follicle in the ovary to grow and develop
-only one follicle will grow which is known as the mature follicle.
- there will be a release of estrogen from the growing follicle
-the release of estrogen stimulate the pituitary gland to release LH.
-this causes the ovum to be released into the fallopian tube and is known as ovulation.
-the remaining portion of the follicle is called the corpus luteum and then releases progesterone.
-the release of progesterone inhibits the release of FSH
-As the corpus luteum disintegrates overtime, the progesterone levels will decrease.
-the progesterone also helps maintain the endometrium, but due to the drop in levels, the lining will start to shed which is is known as the start of the menstrual cycle.

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The pituitary gland secretes FSH that targets the ovary.
FSH stimulates the growth of a single follicle present in the ovary.
The growing follicle secretes estrogen which stimulates the secretion of LH.
LH stimulates ovulation, where the ovum is released from the mature follicle.
The follicle, now a corpus luteum, secretes progesterone, which is responsible for maintaining the endometrium and the inhibition of FSH secretion.
Gradually, the secretion of progesterone decreases.
f implantation of a blastocyst does not occur, then the endometrium breaks down.

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1. The pituitary gland will release the follicle stimulating hormone (FSH).
2. This hormone will stimulate the growth of follicles.
3. 1 follicle will grow into a mature follicle in the ovary.
4. The growing follicle will release oestrogen.
5. This hormone will stimulate the secretion of the luteinizing hormone (LH) from the pituitary gland.
6. The LH will cause ovulation and causes the development of the Corpus Luteum.
7. The Corpus Luteum will release progesterone, which inhibits the FSH.
8.The progesterone will thicken and maintain the endometrium lining.

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1. FSH Stimulates the development of  follicle in ovary.
2. One follicle is growing to a mature follicle
3. Estrogen is produced from the growing follicle and this would stimulate the repair of the uterus lining and LH secretion from the PG
4. LH causes ovulation
5. Corpus liteum is formed
6. Once the corpus Liteum is formed, progesterone is released
7. Once the progesteron is released, FSH is inhibited
8. Progesterone released will help to thicken the lining of the Uterus and would help the maintenance of endometrium.

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Follicle Stimulating Hormone (FSH):
Increase in levels would cause follicle to start growth stage. (Day 5-14) Positive feedback
Estrogen:
As follicle undergo growth stage, estrogen is secreted. This would stimulate the pituitary gland to secrete Luteinising Hormone. (Day 5-14)  Positive feedback
Estrogen would also initiate the thickening of the endometrium. Positive feedback
Luteinising Hormone (LH):
Luteinising hormone stimulates ovulation, the exocytosis of the ovum from the follicle. (Day 14)  Positive feedback
Progesterone:
The remains of the follicle after ovulation will become the corpus luteum. The corpus luteum secretes progesterone which inhibits the secretion of FSH. Negative feedback
Furthermore, the progesterone will continue the thickening and maintenance of the endometrium. (Day 20-28) Positive feedback
Disintegration of corpus luteum causes progesterone levels to decrease hence endometrium lining is unstable and breaks down (day 1 of menstrual cycle) Negative feedback
Decreased level of progesterone allows FSH secretion to resume.

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FSH and LH (pituitary gland) - affect processes in the ovary. FSH stimulates development of follicles.
LH stimulates follicles to mature and release their eggs and the development of corpus luteum. which releases progesterone.
Estrogen and Progesterone (the ovary) - stimulates the development of female secondary sexual characteristics during puberty development of the uterus lining that is needed during pregnancy.
Progesterone and estrogen maintain the thickening of the lining of the uterus (endometrium).

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1. FSH stimulates the development of follicles.
2. Follicles produce estrogen which increase in estrogen has positive feedback on pituitary gland to stimulate LH.
3. Estrogen stimulates the repair of the uterus lining and stimulates LH secretion.
4. LH causes ovulation and it causes development of corpus leteum.
5. Corpus leteum secretes progesteron.
6. progesteron inhibits the release of FSH.
7. Inhibition of release of FSH is a negative feedback of progesteron.
8.  The cycle repeats every month.

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1. FSH produced by pituitary gland, stimulates follicle growth in ovary.
2. 1 follicle will grow into mature follicle in ovary
3. oestrogen is secreted from growing follicle of ovary, stimulates thickening of endometrium.
4. stimulates release of LH by pituitary gland.
5. LH stimulates ovulation
6. development of corpus luteum from remains of the follicle after ovulation.
7. corpus luteum secretes progesterone that inhibits LH and FSH

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Explain the role of Hormones in menstrual cycle. ............   (8)

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Explain the role of Hormones in menstrual cycle. ............   (8)