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Estrous Cycles - Coggle Diagram

- - - - more than 2 sucklings a day will cause anestrus
    - - still go into estrus during lactation but do not conceive at first postpartum estrus ("partial" lactational anestrus)
    - - go into anestrus as part of their cycle regardless of pregnancy; no "lactational" estrus
  - - - silent ovulation: first ovulation after anestrus "primes" brain with progesterone
        
        brain will respond to estradiol & female will display behavioral estrus during next ovulation
- - - - offspring born in spring
  - - - foals born in spring
  - - - interaction with kisspeptin neurons
        
        increase or decrease in GnRH activity
        
        "clusters" of estrous cycles during certain seasons of the year
- - - - estrus: considered the beginning of estrous cycle
        
        standing estrus: female open to mating
        standing position (lordosis): mating posture
        
        important for identifying appropriate time for AI or exposing her to breeding male
        
        most polyestrous spp
        
        no conception
        
        estrus cycle continues
        
        luteal phase
        
        1 more item...
        
        conception
        
        progesterone high
        
        inhibits FSH & LH
        
        1 more item...
        
        cats
        
        proestrus
        
        estrus every 17 days
        
        no copulation
        
        1 more item...
        
        copulation
        
        1 more item...
- - - - typically have 3 cycles/2 years
        
        estrus lasts several days;
        2-3 days btw ovulation & fertilization
        
        females produce multiple oocytes & can have a litter with multiple sires
        
        anestrus: FSH high & stable
        
        proestrus: beginning of cycle
        characterized by blood in vaginal discharge
        estrogen peaks towards end
        
        FSH & LH peak in early estrus
        female is receptive to male during decreasing estrogen & rising progesterone
        
        no metestrus
        instead initial devo of luteal tissue happens shortly after ovulation, during estrus
        
        length of diestrus does not change if dog is pregnant
        progesterone peaks around 15 days & decreases gradually