1. Click and wait for everything to happen.
Canine Estrous Cycle
Click and wait for everything to happen.

2. Canine Estrus

3. Normal Physiology
Review

4. Anatomy Brain Hypothalamus Anterior pituitary Uterine horns Ovaries
Cervix
Vagina/
vestibule
Uterine body

5. Follicular growth: Proestrus and Estrus Proestrus GnRH Estrogen FSH

6. Ovulation - Pregnancy/ Diestrus GnRH Ovulation Corpus luteum
Estrogen
GnRH
Ovulation LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH
Corpus luteum LH LH LH LH
Progesterone

7. Proestrus Anestrus Estrus Pregnancy/Diestrus Canine Estrous Cycle
9 days
Canine
Estrous Cycle
Anestrus
90 days
Estrus
9 days
Pregnancy/Diestrus
60 days

8. Follicular growth: Proestrus and Estrus Proestrus GnRH Estrogen FSH1 9 2 3 5 4 6 7 8

9. Ovulation - Estrus GnRH Ovulation Corpora lutea Progesterone EstrogenLH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH
Progesterone initial rise starts with LH peak and rises during estrus (not diestrus) LH LH LH LH LH
Ovulation over 24 hours LH
Corpora lutea LH LH LH LH
Progesterone
LH Surge
Proestrus
Estrus 1 9 2 3 5 4 6 7 8 1 9 2 3 5 4 6 7 8

10. LH Surge Ovulation Metaphase II and polar body extrusion
Metaphase II secondary oocyte with polar body LH LH LH LH LH LH
24 hours
24 hours
LH Surge
Ovulation
Estrus 1 9 2 3 5 4 6 7 8 1 2 4 3 5 6

11. Eggs ready for fertilization Fertile period = 3-6 days post LH
Reduction Division
Eggs ready for fertilization
Fertile period = 3-6 days post LH
LH = day 0
LH Surge
Ovulation
Estrus 1 9 2 3 5 4 6 7 8

12. You are done!