Eutocia & Dystocia Flashcards
What are cows called “springers” when it comes to pre-parturient changes?
Their sacorciatic & sacrotuberous ligaments relax causing their tail head to raise & their butts to bounce
When does udder edema & milk production begin pre-partum?
~1-2 weeks prior
What hormone(s) causes myometrial contractions?
Estrogen(directly) & PGF2a
Fetal stress leads to an increase in fetal _____ which becomes fetal ____
ACTH, Cortisol
Where does the hormone Relaxin come from and what does it do?
Luteal cell of ovary
Relaxation of pelvic ligaments
The maturation of the fetal ______-_____-_____ _____ is the start of the triggers of parturtion.
Hypothalamic-hypophyseal-adrenal axis
The maturation of the fetal Hypothalamic-hypophyseal-adrenal axis allows increased sensitivity of the fetal adrenal glands to what?
ACTH
What occurs in stage 1 of eutocia?
Initiation of myometrial contractions
What occurs in stage 2 of eutocia?
Explusion of the fetus
What occurs in stage 3 of eutocia?
Expulsion of fetal membranes
What initiates stage 1 of parturition?
The fetus!- Fetal cortisol
from the ACTH released by the fetus’s adrenal glands
Where do myometrial contractions begin in a monotocous species versus polytocous species?
Mono: Apex of pregnant horn
Poly: Cranial to most caudal fetus
Which species rotate into position during stage 1 of parturition?
Horses
What is the “water breaking” signify?
Rupture of the chorioalloantoic membrane and the end of stage 1
What is it called when the wedging of fetus into cervical canal stimulates oxytocin release, which stimulates more uterine contractions, etc.
Ferguson’s reflex
