Sheep and Goat Reproduction Flashcards
(46 cards)
What is the length of the estrous cycle in the sheep?
In the goat?
sheep - 17 days
goat - 21 days
What is the length of estrus in the sheep?
In the goat?
sheep - 30 hours
goat - 36 hours
What is the length of gestation in the sheep?
In the goat?
sheep - 147 days
goat - 150 days
What is the source of P4 in the sheep?
In the goat?
sheep - placenta
goat - CL
What is flushing?
increasing nutrient uptake by 20-30% 2-3 weeks prior to breeding
What hormone is responsible for maternal recognition?
interferon tau
What type of placenta does the sheep and goat have?
cotyledonary epitheliochorial
What are the common causes of dystocia in the sheep and goat?
- fetal postural abnormalities
- multiple fetuses trying to exit at the same time
- singletons too large
What is Ringwomb?
- failure of cervix to completely dilate
- considered heritable
When does pregnancy toxemia usually occur?
- final trimester
- multiple fetuses
- obese or thin ewes
What are the treatment options for pregnancy toxemia?
- remove fetuses (C-section, induction)
- glucose IV, dextrose IV
- propylene glycol by mouth
- B vitamins to stimulate appetite
- transfaunation
What can result from ingestion of Veratrum californicum?
- EED in early gestation
- cyclops if between 12-14 days
- arthrogryposis
What can result from ingestion of locoweed?
- abortion
- arthrogryposis
- decreased spermatogenesis in rams
What can result from ingestion of broomweed?
- abortion
- retained fetal membranes
- arthrogryposis
What can result from ingestion of estrogen-producing plants?
- hyperestrogenism
- vaginal prolapse
- subclinical reproductive impairment
How is bluetongue virus transmitted?
Cullicoides species
What are the clinical signs associated with bluetongue?
- fever
- swollen ears, face, and tongue
- +/- abortion
- fetal malformations (hydroencephaly and arthrogryposis)
What type of virus is border disease?
Pestivirus
Describe the pathogenesis of Border Disease Virus
- oral transmission
- infected fetoplacental unit
- EED, resorption, mummies, congenital defects, PI animals
What congenital defects can be caused by Border Disease virus?
hydroencephaly
cerebellar hypoplasia
What are the clinical signs associated with Border Disease Virus?
- weak, hairy lambs
- darker pigmentation
- tremors
How is Border Disease virus diagnosed?
virus isolation
How is Cache Valley disease transmitted?
mosquitoes
What are the clinical signs associated with Cache Valley disease?
- fever and depression
- stillbirth, congenital defects
