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Topic4_Notes_ANS3319CPuberty_Final

Topic4_Notes_ANS3319CPuberty_Final - ANS 3319C Reproductive...

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38 ANS 3319C Reproductive Physiology and Endocrinology Puberty Section Puberty 1) Prenatal development _____________________________________________________________________________ Male (Fig 6-1) _______________________________________________________________________ ____________________________________________________________________ _______________________________________________________________________ Female _______________________________________________________________________ ____________________________________________________________________ _______________________________________________________________________ Actions lead to different postnatal LH secretion patterns (Fig 6-2)
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39 ANS 3319C Reproductive Physiology and Endocrinology Puberty Section 2) Female Definition of Puberty ____________________________________________________________________________ ____________________________________________________________________________ _________________________________________________________________________ _________________________________________________________________________ Scientific approach: rectal palpation, ultrasonography, laproscope ____________________________________________________________________________ 3) Male Definition Puberty ____________________________________________________________________________ _________________________________________________________________________ ____________________________________________________________________________ _________________________________________________________________________ Substantially precedes ability to produce enough sperm for fertilization ____________________________________________________________________________ Species differences Bull: > 50 x 10 6 sperm/mL w/ 10% motility 4) Factors affecting onset of puberty Age (chronological) Varies greatly among species, w/in a species, & gender (Table 6-1, 6-2) Table 6-­‐1. Average age (range) of puberty in male and female of various species Species Male Female Bovine 11 mo (7-­‐18 mo) 11 mo (9-­‐24 mo) Equine 14 mo (10-­‐24 mo) 18 mo (12-­‐19 mo) Porcine 7 mo (5-­‐8 mo) 6 mo (5-­‐7 mo) Ovine 7 mo (6-­‐9 mo) 7 mo (4-­‐14 mo) Canine
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