1. Estrous Cycle Topic 3096 C Amanda Trutsch

2. Estrus The period of mating activity in the female mammal Same as heat

3. Estrous An adjective meaning “heat”, which modifies such words as cycle Estrous cycle is the heat cycle, or time from one heat to the next

4. Hormones involved Gonadotropin-releasing hormone (GnRH)  Source: Hypothalamus  Target: Anterior pituitary  Function: Release LH and FSH

5. Luteinizing hormone (LH)  Source: Anterior pituitary  Target: Ovary  Functions: Ovulation, CL formation, Progesterone production Hormones involved, cont.

6. Follicle-stimulating hormone (FSH)  Source: Anterior pituitary  Target: Ovary  Function: Development of follicle

7. Hormones involved, cont. Estrogen  Source: Follicle  Target: Uterus  Function: Mating behavior

8. Hormones involved, cont. Progesterone  Source: Corpus luteum  Target: Uterus  Function: Maintains pregnancy

9. Hormones involved, cont. Prostaglandin (PGF 2a )  Source: Uterus  Target: Corpus luteum  Function: Regression of CL

10. Estrous Cycle http://www.equine-reproduction.com/articles/images/Hormones.gif