Animal Reproduction
Lu Dao DVM
Male Reproductive Anatomy
• Scrotum
– two lobed skin sac
– ?
• elongates and contracts
• Testes
– Seminiferous tubules
• small convoluted tubule
• ?
• If tubules stretched out from a pair of bull testesà50 football fields
– ?
• Cells located in spaces between seminiferous tubules
• Testosterone
– Muscular features, aggression
• Epdidmymis
– transports sperm to accessory sex glands
– ?
– maturation
– Concentration
• ?
• Vas deferens
– Transports sperm through the accessory sex glands, seminal vesicles, Cowper’s
gland, prostate gland
• ?
• Seminal fluid consists of fructose and sorbitol
• Penis
– blood
– sigmoid flexure enlarges from ?
• Testes begin in the ?
• Descent of Testicles
– ?
• Ligament that is attached to testes at the tail of the epididymis at one
end
• Ligament is attached to base of future scrotum (labia majora)
• As ligament contracts the testes gets pulled through the ?
• Cryptorchidism
– ?
• Pelvic, iliac, lumbar
– failure to descend
, – complications? breeding
Breeding Soundness Exam
• Semen Volume
• ?
• Percent morphologically
• ?
Castration
– Surgical knife
• sedation and anesthesia
• bottom third of scrotum
• traction in animals less than 4 months
– ?
• local anesthesia
• elastic band cuts off blood supply
– bloodless castration
• 1-3 weeks old
– Emasculatome
• crush and rupture spermatic
• ?
• older lambs and kids
Stocking Rates
• Cattle 1:25-40
• Horses 1:20-30
• Sheep ?
• Pigs 1:25-50
• Goats 1:30
• Rabbits 1:10
• Chickens 1:12
• Ducks ?
• Turkeys 1:10-20
• Ostriches 1:7-10
Puberty
• Period when reproductive system becomes mature in form and function
• Male
– Pituitary releases hormones
• ?
• LH-testosterone
• Female
Lu Dao DVM
Male Reproductive Anatomy
• Scrotum
– two lobed skin sac
– ?
• elongates and contracts
• Testes
– Seminiferous tubules
• small convoluted tubule
• ?
• If tubules stretched out from a pair of bull testesà50 football fields
– ?
• Cells located in spaces between seminiferous tubules
• Testosterone
– Muscular features, aggression
• Epdidmymis
– transports sperm to accessory sex glands
– ?
– maturation
– Concentration
• ?
• Vas deferens
– Transports sperm through the accessory sex glands, seminal vesicles, Cowper’s
gland, prostate gland
• ?
• Seminal fluid consists of fructose and sorbitol
• Penis
– blood
– sigmoid flexure enlarges from ?
• Testes begin in the ?
• Descent of Testicles
– ?
• Ligament that is attached to testes at the tail of the epididymis at one
end
• Ligament is attached to base of future scrotum (labia majora)
• As ligament contracts the testes gets pulled through the ?
• Cryptorchidism
– ?
• Pelvic, iliac, lumbar
– failure to descend
, – complications? breeding
Breeding Soundness Exam
• Semen Volume
• ?
• Percent morphologically
• ?
Castration
– Surgical knife
• sedation and anesthesia
• bottom third of scrotum
• traction in animals less than 4 months
– ?
• local anesthesia
• elastic band cuts off blood supply
– bloodless castration
• 1-3 weeks old
– Emasculatome
• crush and rupture spermatic
• ?
• older lambs and kids
Stocking Rates
• Cattle 1:25-40
• Horses 1:20-30
• Sheep ?
• Pigs 1:25-50
• Goats 1:30
• Rabbits 1:10
• Chickens 1:12
• Ducks ?
• Turkeys 1:10-20
• Ostriches 1:7-10
Puberty
• Period when reproductive system becomes mature in form and function
• Male
– Pituitary releases hormones
• ?
• LH-testosterone
• Female
