Lecture 19: Canine & Feline Preg & Dx Flashcards
are dogs CL dependent to term?
yes!
what is the progesterone level during diestrus in dogs?
high; irrespective of pregnancy status
when will the CL lyse?
luteolysis occurs in pregnant bitches 63 - 65 days following LH surge due to prostaglandin F release
placental type of dogs:
endotheliocorial, zonary, deciduate
when is palpation in dogs easiest?
31 - 33 days post LH peak
about 1 month after LH/ovulation
is palpation more or less difficult 35 days after LH peak and why?
more difficult; bc vesicles elongate
when is ultrasound easiest in dogs?
3 - 4 weeks after LH/ovulation (25 days)
in late gestation what can be used to determine fetal wellness/
fetal HR - if HR drops below 160 that is severe stress and requires immediate intervention.
what is relaxin used for in dogs?
- Preg dx!
when is the relaxin test positive in dogs?
may be positive as early as day 21 - 22 after breeding
- if negative, recheck in 7 - 10 days is REQUIRED!
- check once at least 28 days post LH
when is radiography most useful?
late in gestation for litter size
when do fetal skulls start calcifying in dogs?
43 - 45 days post LH
45 days - skull
61 days - teeth
know gestation length for dogs
65 +/- 1 day post LH peak
57 +/- 1 day post DIESTROUS cytology
57 - 72 days from 1st breeding
canine herpes virus what does it cause?
abortion, mummies, stillborns, pre-mature delivery
what is the transmission of canine herpes?
respiratory, oral, venereal
when are pregnant bitches most at risk?
if they are naiive
and
3 weeks pre-partum and 3 weeks post-partum
hypoluteoidism
low progesterone (< 2ng/ml) : it will result in parurition or pregnancy loss
tx of hypoluteoidism
tx: P4 supplementation to term.
but MUST be stopped prior to parturition
if used early in gestation it will cause fetal masculinization
what type of ovulators are felines?
induced ovulators!
what type of placenta do cats have?
endotheliochorial, zonary, deciduate (same as dog)
length of gestation in a cat?
65 - 67 days
are cats CL dependent to term? anything unique?
yes! dependent to term but P4 CANNOT be used to dx pregnancy.
what is the effect of relaxin in felines?
promotes prolactin release
what characteristics are suggestive of pregnancy in the cat?
- mammary gland changes (@ 3 weeks)
- nipples are pinker and more prominent
- more docile temperment
when can you palpate pregnancy in a cat?
> 2 weeks gestation
when can you ultrasound a pregnancy in a cat?
as early as about 2.5 weeks post mating
what is the effect of relaxin in a pregnant cat?
can be used to diagnose pregnancy after 28 days of gestation (use serum or urine)
when is it best to use radiography in the cat?
- after 38 - 43 days gestation to see calcification of skull
- fetal molars calcify at 56 - 63 days
- use crown rump length to estimate gestational age
