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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: é 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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