Males 🚹 Flashcards
Descent of Testes
🐶: 14d ➡️ 6mo
🐱: at birth ➡️ 10mo
🐎: 10d ➡️ 9 mo
Puberty factors
Poor BCS = ⬇️LH thats req for Testosterone
Sm breeds hit puberty earlier
Puberty onset
🐶🐱: 9mo
🐎: 14mo
🐄: 11 mo
🐑 🐷: 7mo
🐐: 5mo
Llama/alpaca: 2-3y
Puberty endocrine
Prepub: 🚺🚹 both ✅active GnRH SURGE CENTER & TONIC SC
Post-pub:
🚺 ✅both
🚹 🚫SURGE CENTER ➡️✳tonic ️LH SURGE ➡️ freq rel Testosterone
HPA Gonadal axis
Hypothal: ✳️ GnRH
➡️A.Pitu: ❇️FSH➡️Sertoli cells
❇️LH➡️ Leydig cells
Sertoli cells
DIE
Dihydrotestosterone
Inhibin
Estradiol
Leydig cells
Testosterone
Estrone sulfate
Duration of spermatogenic cycle
2 months
60d
14d for maturation in epididymis
Thermoregulation testes
1° Tunica dartos- sm Mm
Cremaster - striated Mm
MC Acc gl pathos
🐶: prostate (only acc gl)
🐎: ampullae
🐄: vesicular gl
Sperm morphalogic defect
Tetrazoospermia
1°: production defect in SEMINIFEROUS TUB
2°: maturation/storage defect in EPIDIDYMIS
3°: post-ejac/iatrogenic
Min total sperm count in 🐶
300 million sperm
Low standard
If azoospermia, confirm Dx test
Measure semen ALP
> 500 u/L ➡️ partial emptying
Brucella canis
Serology ➡️ add 2-ME
Cornell AGID
MO blood culture
Scrotal circumference
Directly correlated to: SAG
Sperm production capacity
Age of puberty onset
Growth traits
🐃 have SFT min standards
>50cm is TOO BIG