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Canine Estrous Cycle
                 Click and
                  wait for
               everything to
                  happen.
Canine Estrus
Normal
Physiology
  Review
Brain
                                   Anatomy
                 Hypothalamus
Anterior
pituitary
                           Uterine horns
    Ovaries

                                  Cervix

                                           Vagina/
                            Uterine        vestibule
                            body
Estrogen   Follicular
Proestrus   FSH              growth:
GnRH
                             Proestrus
      FSH                    and Estrus
Ovulation -
                                                        Estrogen
                                                                        Pregnancy/
 GnRH                   LH
                           LH
                                                              Ovulation Diestrus
                   LH
                       LH
                 LH        LH                 LH
                LH   LH LH                                 LH
                  LH        LH               LH
                                                         LH
                LH   LH                       LH
                                                        LH
                                                   LH
                          LH
                                 LHLH
                                        LH

Corpus luteum
                          LH
                                    LH
                           LH     LH




         Progesterone
Proestrus
                   9 days



Anestrus                         Estrus
  90 days                         9 days




            Pregnancy/Diestrus
                   60 days
Estrogen   Follicular
Proestrus             FSH                growth:
GnRH
                                         Proestrus
        FSH                              and Estrus


              Proestrus
    1   2   3 4 5 6       7   8   9
Estrogen           Ovulation -
 GnRH                                                             Ovulation
                                                                             Estrus




                                                                             Ovulation over 24 hours
                        LH
                           LH
                   LH
                       LH
                 LH        LH                 LH
                LH   LH LH                                 LH
                  LH        LH               LH
                                                         LH
                LH   LH                       LH

                          LH
                                 LHLH
                                                   LH
                                                        LH
                                                                                                        Progesterone initial
                                        LH
                                                                                                          rise starts with LH
Corpora lutea
                          LH
                                    LH
                           LH     LH
                                                                                                        peak and rises during




                                                                  LH Surge
                                                                                                         estrus (not diestrus)
         Progesterone


                Proestrus                                                                               Estrus
     1    2   3 4 5 6                    7         8         91    2         3                         4 5 6      7    8   9
LH                                    Metaphase
                                                   Metaphase II
                        LHLH

               LH                                    II and polar
                                                   secondary
                           LH
                   LH    LH
                                                     body
                                                   oocyte with
                                                     extrusion
                24                                 polar body
               hours


               Ovulation
    LH Surge


                                    24
                                   hours

                                    Estrus
1      2       3               4           5   6       7     8      9
       0       1                2          3   4   5        6
Reduction Division
               Ovulation
    LH Surge

                                                   Eggs ready for fertilization
                                                Fertile period = 3-6 days post LH
                                                             LH = day 0
                                            Estrus
1      2       3              4                    5     6        7       8   9
You are done!

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Estrus web

  • 1. Canine Estrous Cycle Click and wait for everything to happen.
  • 4. Brain Anatomy Hypothalamus Anterior pituitary Uterine horns Ovaries Cervix Vagina/ Uterine vestibule body
  • 5. Estrogen Follicular Proestrus FSH growth: GnRH Proestrus FSH and Estrus
  • 6. Ovulation - Estrogen Pregnancy/ GnRH LH LH Ovulation Diestrus LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LHLH LH Corpus luteum LH LH LH LH Progesterone
  • 7. Proestrus 9 days Anestrus Estrus 90 days 9 days Pregnancy/Diestrus 60 days
  • 8. Estrogen Follicular Proestrus FSH growth: GnRH Proestrus FSH and Estrus Proestrus 1 2 3 4 5 6 7 8 9
  • 9. Estrogen Ovulation - GnRH Ovulation Estrus Ovulation over 24 hours LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LH LHLH LH LH Progesterone initial LH rise starts with LH Corpora lutea LH LH LH LH peak and rises during LH Surge estrus (not diestrus) Progesterone Proestrus Estrus 1 2 3 4 5 6 7 8 91 2 3 4 5 6 7 8 9
  • 10. LH Metaphase Metaphase II LHLH LH II and polar secondary LH LH LH body oocyte with extrusion 24 polar body hours Ovulation LH Surge 24 hours Estrus 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
  • 11. Reduction Division Ovulation LH Surge Eggs ready for fertilization Fertile period = 3-6 days post LH LH = day 0 Estrus 1 2 3 4 5 6 7 8 9