Equine Cycle Flashcards
mares are __ day breeders having estrus in the __
long, summer
lengthening days __ melatonin secretion and __ GnRH and LH while FSH is __
decreases, increases, maintained
estrogen has __feedback on LH and __ feedback on FSH
positive, negative
progesterone has __ feedback on LH
negative
mares only have __ and __
estrus (3-9 days) and diestrus (14-16 days)
is the CL palpable in the mare?
no, the ovaries are inside out
diestrus ends with __ as a result of PGF from the __
luteolysis, uterine myometrium
LH peaks __ ovulation in the mare as a result of __ feedback
after, positive
when would you see a tomato/wagon wheel appearance of the ovary on ultrasound?
during estrus as a result of edema induced by estrogen from dominant follicle
if you need to lyse the CL it can only be done __ days post ovulation
5+
__ and __ can be used to lyse the CL
Prostaglandin/Dinoprost and Prostaglandin analog/cloprostenol
a stallion broke out of your barn and bred your best mare, when should you give prostaglandin?
14+ days post exposure because estrus is up to 9 days and lysis can’t happen until after 5
what drugs may be used to induce ovulation?
LH analog/human chorionic gonadotropin
GnRH analog/ Deslorelin (Sucromate)
what drugs can be used to suppress estrus?
progesteron
altrenogest
