Reproduction Flashcards
Describe hormones during proestrus
Progesterone drops while estrogen rises
During what phase of the estrous cycle will you see vaginal bleeding, swollen vulva and starting makes but not letting them mount
Proestrus
Describe hormones during estrus
Progesterone at its lowest, estrogen at its highest
The LH surge occurs during which phase of estrous
Estrus - induces ovulation
Describe hormones during metestrus
Progesterone increases
Describe hormones during Diestrus - what does this predispose the animal to and why
High progesterone which can predispose to pyometra because progesterone inhibits leukocyte response to infection, suppresses myometial activity and promotes endometrial growth
Which species experience a true lactational anestrus - what does this man
Pigs and cats - means they won’t cycle until they are no longer lactating
How do you synchronize pigs
Batch wean at 3-4 weeks because they don’t ovulate while lactating - should see estrus in 4-6 days
Pigs are dependent on what source of progesterone during pregnancy
Ovarian source the entire time
List the number of teats the following species have - pig, dog, cat, cow, sheep and goat
Pig- 14, dog, 10, cat, cow 4, sheep and goat 2
What is the whitten / buck effect in sheep and goats
Introduce a new buck causes sheep and goats to ovulate at the same time
Sheep and goats are seasonally polyesters during - and - and breed during - days
Full and winter, breed during short days
Describe progesterone sources during pregnancy for sheep and goats
Initially from CL but the placenta takes over early on in pregnancy
Describe the source of progesterone during pregnancy in a cow
From the cl then augmented by placenta (need both)
AI is done intra- in the cow
Intrauterine
