Involution

Question 1

describe endometritis
-what it is
-signs
-affect of cycle
-treatment excl Abs

Answer 1

2 types:

1. metritis - really bad-> systemic illness and fatal (very symptom
2. endometritis - only affects endometrial
   -usually subclinical

oxytocin/pgf2a - to stimulate uterine contraction to eject any lochia

Question 2

Why is it important for the cervix to recover quickly?

Answer 2

cervix needs to recover quickly - important barrier to prevent infections

Question 3

Timing of post-partum across species

Answer 3

lactational anestrous - affects length

mares - very rapid resumption of cycling

Question 4

Why do beef cows have faster uterine involution but take longer to start cycling compared to dairy cows?

Answer 4

Dairy cows need to cycle faster to have mo

Lactional

Uterine involution: Driven by oxytocin. Have more oxytocin - because calf suckling multiple times a day vs dairy calf feeding twice a day.

Longer to start cycling - Because of the calf suckling = more oxytocin

Calf starting to wean will allow HPG axis to resume

Question 5

Re-breeding postpartum

Answer 5

Interval between parturition(or weaning) and re-breeding is carefully managed in livestock

Dairy - voluntary wait period

sows - weaning to first service interval

Question 6

importance of wait period

Answer 6

2

1. allows time for uterine repair (higher chance of success)
2. limit non-productive days (not lactating/pregnant)

Question 7

Describe re-breeding postpartum in Mares and why its different

Answer 7

later ovultation occurs = increased preg rate

Question 8

if the mare has foaled very early in spring

Answer 8

foal heat may be delayed

Question 9

name the hormones involved in uterine involution

Answer 9

PGF2a , E2, oxytocin