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Topic8B_ANS3319CRepro_CyclicityFolliclePhase_FinalNotes

Topic8B_ANS3319CRepro_CyclicityFolliclePhase_FinalNotes -...

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94 ANS 3319C Reproductive Physiology and Endocrinology Follicle Phase Reproductive Cyclicity: Follicular Phase 1) Significant events of follicle phase (Fig 8-4) _____________________________________________________________________________ __________________________________________________________________________ _____________________________________________________________________________ __________________________________________________________________________ Tonic GnRH center: basal LH (ventromedial nucleus/arcuate nucleus) ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ Surge Center (preoptic nucleus & suprachiasmatic nucleus) ____________________________________________________________________ ____________________________________________________________________ _________________________________________________________________ Summary of endocrine events leading to ovulation
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95 ANS 3319C Reproductive Physiology and Endocrinology Follicle Phase 2) Folliculogenesis ________________________________________ (2 - 4 waves/cycle; Fig 8-7, species differences) Estrous & menstrual cycles _______________________________________________________________________ _______________________________________________________________________ Follicle waves during prepubertal period, pregnancy, anestrus _______________________________________________________________________ Stages of folliculogenesis __________________________ _______________________________________________________________________ `_______________________________________________________________________ _______________________________________________________________________ __________________________ _______________________________________________________________________ _______________________________________________________________________ _______________________________________________________________________ Polytoccous: several follicles selected Monotoccous: typically a single follicle selected __________________________ _______________________________________________________________________ ____________________________________________________________________ _______________________________________________________________________ ____________________________________________________________________ Estrogen ê blood flow to non-selected follicles __________________________ _______________________________________________________________________ _______________________________________________________________________
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96 ANS 3319C Reproductive Physiology and Endocrinology Follicle Phase Ovulatory follicle size, mm Cow 12-20 Sheep 6-7 Pigs 7-10 Horses 40-55 Dogs 7-11 Cats 3-4 Chicken up to 40 Humans 23
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