
The female estrus cycle
The female estrus cycle
- The anterior pituitary gland secrets a hormone called follicle stimulating hormone (S.H.) which stimulates the growth of Graafian follicles in the ovary
- It also stimulates the ovary to secrete a female sex hormone – estrogen.
- Estrogen causes the signs of heat in females and also stimulates the anterior pituitary glands to produce another hormone called Luteinizing hormone (LH).
- Estrogen makes the female animal more receptive to the male and increases sex urge in females.
- Luteinizing hormone causes the rapture of mature follicles to release the ova in the process of ovulation.
- After ovulation, luteinizing hormone stimulates the development of the yellow body (corpus luteum) from the remains of the follicles.
- The corpus luteum produces a hormone known as progesterone which stimulates the growth of the endometrium in preparation for implantation.
- Progesterone also inhibits the release of follicle stimulating hormone and luteinizing hormone from the anterior pituitary gland.
- After a successive fertilization, the progesterone stimulates the growth and improves blood supply to the endometrium for successful implantation.
- After implantation, the corpus luteum degenerates and the placenta becomes the new source of progesterone.
CATEGORIES General
TAGS Dr. Bbosa Science
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