species differences in cycle and pregnancy Flashcards
what 3 animals have an oestrus that lasts more than 2-3 days and when do each ovulate
mare(4-8 ) and bitch (7-14)
-bitch 2 days after onset of oestrus ( 12 day rule )
-mare 1-2 days before end of oestrus )
how long mares cycle ?
21-23 days
What animal is a seasonal polyoestrus ( long day )
mare
rabbit
what animal/s is a seasonal polyoestrus short day?
ewe
What cyclicity does a dog have ?
monoestrus
length cows cycle
18-24 days
length of ewes cycle
17 days
length of sows cycle
21days
how long queens cycle
21 days interoestrous interval
what animals oestrus lasts less than or equal to 2-3 days ? and when ovulate
-cow - 5-18 hrs ( 12 hrs after end oestrus )
- ewe - 2 days - 2 days and half ( towards end oestrus last 6 hours )
-sow - 2 -3 days ( 35- 45 hours from beginning of oestrus )
when would you mate and inseminate each animal depending on their oestrus cycle ? and problems faced
-cow -mate and inseminate at oestrus ( p oestrus detection )
-sheep - mated throughout oestrus , inseminate 12 hrs after signs ( p ram: ewe ratio and identifying mated ewes)
-sow mate and inseminate on day after onset of oestrus (p oestrus detection as housed apart )
- mare teased daily and breed throughout period , monitor ovaries ( p oestrus length very variable and return to oestrus is very variable )
-bitch use vaginal cytology and plasma progesterone to measure when ready ( p - very variable , oestrous detection poor tool )
outline methods used to detect oestrous
-estrotect
-kamar
–examine cow - 4 times day for 30 min
-heatwatch
-milk progesterone low
-ultrasound ovary -large dominant follcile without cl
-assessment of vaginal epithelial cells
-plasma progesterone conc
what is ovsynch ?
uses a combination of GnRH and PGF2a used to synchronise ovulation
gestation length of cat
63 days
gestation length of dog
63-65
