Topic8A_ANS3319CRepro_Cyclicity_Final_Notes

Topic8A_ANS3319CRepro_Cyclicity_Final_Notes - 83 ANS 3319C...

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Unformatted text preview: 83 ANS 3319C Reproductive Physiology and Endocrinology Reproductive Cycles Reproductive Cyclicity 1) Estrus (noun) (European: oestrus, oestrous) ____________________________________________________________________ Seasonal animals: in season 2) Estrous cycle (Estrous adjective) _____________________________________________________________________ __________________________________________________________________ Continual throughout adult life, temporarily interrupted by: ______________________ Pregnancy, nursing, season of year (species specific), inadequate nutrition, stressful environment & (or) management conditions, pathologic conditions Types (Fig 7-1) ______________________________ (cattle, swine, rodents, domestic cats) _____________________________________________________________________ Pregnancy opportunities year-around ___________________________________ (sheep, goats, horses, deer, elk, wild cats) ____________________________________________________________________ Pregnancy opportunities only during specific season Artificially manage: light in mares during winter _______________________________________ (sheep, goats, elk, deer) ______________________________________________________________ ________________________________________ (horses, wild cats) ______________________________________________________________ __________________________________ (dogs, wolves, fox, bear) ___________________________________________ _____________________________________________________________________ _____________________________________________________________________ 84 ANS 3319C Reproductive Physiology and Endocrinology Reproductive Cycles Phases of estrous cycle (Fig 7-2, 7-3) Follicle phase (20% of cycle) __________________________________________ ___________________________ (2-5 days) _____________________________________________________________________ _____________________________________________________________________ FSH/LH primary hormones ____________________________ (hours to days: species dependent) _____________________________________________________________________ __________________________________________________________________ Sexual receptivity + peak estrogen + LH surge + ovulation Luteal phase (80% of cycle) _____________________________________________ ________________________ (Period between ovulation & initial CL formation) __________________________________________________________ __________________________________________________________ Fig 7-1 85 ANS 3319C Reproductive Physiology and Endocrinology Reproductive Cycles __________________________ (longest stage of cycle) ______________________________________________________________________...
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Topic8A_ANS3319CRepro_Cyclicity_Final_Notes - 83 ANS 3319C...

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