1 / 15

Female Hormone Regulation

Female Hormone Regulation. Reminder. Hypothalamus secretes GnRH GnRH stimulates anterior pituitary to release FSH and LH. FSH function in females. Responsible for follicular phase FSH stimulates maturation of ovum in ovary Ie) “Stimulates follicle”. LH function in females.

rod
Download Presentation

Female Hormone Regulation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Female Hormone Regulation

  2. Reminder • Hypothalamus secretes GnRH • GnRH stimulates anterior pituitary to release FSH and LH

  3. FSH function in females • Responsible for follicular phase • FSH stimulates maturation of ovum in ovary Ie) “Stimulates follicle”

  4. LH function in females • LH stimulates the follicle cells (more specifically corpus luteum) to produce progesterone and estrogen

  5. Progesterone Hormone • Controls the secretory phase • Stimulates maturation of the endometrium (inner lining of uterus) • Breast development

  6. Estrogen Hormone • Controls proliferative phase • Building of endometrium • Stimulates the maturation of ovum as well • Develops 2° sex characteristics • Fat & hair • distribution • Growth of uterus & vagina • Breast development

  7. Estrogen Hormone • When estrogen gets too high it creates a “-” feedback loop on anterior pituitary • Causes a decrease in LH & FSH Ie) this is meant to prevent estrogen levels from getting too high

  8. Estrogen Hormone • Day 14, when the follicle matures and estrogen levels are the highest, there is a steep spike in LH (and also FSH) • Believed that the significantly high level of estrogen creates a POSITIVE feedback on hypothalamus • This causes the surge of LH (and FSH) = ovulation results

  9. Corpus Luteum • The remaining follicular tissue after ovulation • Secretes progesterone & after a few days estrogen • Progesterone stimulates the endometrium to mature and become secretory • Estrogen stimulates continual thickening of endometrium wall • This prepares the uterus for possible fertilization & pregnancy

  10. Corpus Luteum • Corpus luteum degenerates after 10 days if not pregnant • This reduces the estrogen/ progesterone and the endometrium sheds as a result =menstruation • Lasts ~5days and anterior pituitary begins releasing LH & FSH again • Starts new cycle

  11. Ovarian Cycle

  12. What happens in the ovarian phase causes the uterine phase

  13. Uterine Cycle

  14. Key Ideas • Hypothalamus and An Pit controls OVARY by secreting FSH & LH • Ovary ripens egg & release on day 14 • Ovary secretes estrogen/ progesterone • OVARY controls UTERUS by way of estrogen/ progesterone

  15. Ovarian & Uterine Cycle

More Related