Crypto preservation of Gametes and Embryos and Quizzes(3) Flashcards
what is crypto preservation?
storage at -196 degrees celcius (liquid nitrogen)
why do we do crypto preservation?
preserve cells for long periods of time
freezing process for cyrpto preservation…
add cryoprotectant, cool, freeze, store, thaw
osmotic changes…
concentration
osmotic tolerance…
how well a cell survives osmotic changes
challenges for sperm?
cannot repair themselves, damage to one renders cell infertility
does true conceptus occur in all farm animals?
no
why do we do milk calcium tests on mares?
to see how close they are to foaling
what starts parturition?
the fetus becoming stressed
when happens in stage one of parturition?
cervix dilates to 10 cm, the uterus contracts due to oxytocin, and the fetus goes headfirst to dilate the cervix further
what does prostaglandin do?
causes contractions of the uterus and kills the corpora lutea to stimulate release of oxytocin
what does relaxin do?
relaxes pelvic muscles
what does estrogen do?
stimulates vaginal and cervical mucous secretions
what does ocytocin do?
causes contractions
what does fetal cortisol do?
causes parturition to occur
what layer of the uterus contracts in response to oxytocin?
myometrium
define placentome
Point of interface between fetal cotyledon and maternal cotyledon that originates from the caruncle
what is red bag?
condition that occurs where both parts of the placenta present together as the mare gives birth
What parts of the repro tract are involved in parturition?
cervix, vagina, uterus, vulva
