Lecture 20: Feline Repro (Kelleman) Flashcards

0
Q

when do cats reach puberty?

A

as early as 4 months

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1
Q

when is heat for cats?

A

proestrus and estrus

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2
Q

what type of cycle do cats have?

A

seasonally polyestrus - repeated estrous cycles for a portion of the year
(just like horses, sheep, and goats)

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3
Q

what is the seasonality of cats?

A

they are long-day seasonally polyestrus breeders

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4
Q

parts of the estrous cycle in cats

A
proestrus
estrus
postestrus or interestrus
diestrus
anestrus
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5
Q

do cats have pre-ovulatory progesterone?

A

no!

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6
Q

do cats have vulvar discharge?

A

no!

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7
Q

length of proestrus

A

short - may not be observed

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8
Q

behavior of cat during proestrus

A

attractive to male, will not allow mating; affectionate

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9
Q

anatomy of a cat during proestrus

A

ovarian follicular growth

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10
Q

hormonal effect of proestrus in cats

A

estrogen is HIGH

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11
Q

length of estrus in cats

A

variable, several days to 2 weeks

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12
Q

behavior of cats in estrus

A

attractive to male, allows mating; affectionate

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13
Q

anatomy of a cat during estrus

A

ovarian follicular growth

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14
Q

hormonal effect of a cat in estrus

A

estrogen PEAKS

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15
Q

Ovulation in cats

A

Induced ovulator!
induced by coitus
occasionally spontaneous

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16
Q

how is ovulation induced?

A

adequate vaginal stimulation from mating will cause GnRH release, LH surge and ovulation

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17
Q

what is the best chance of ovulation in cats?

A

4 matings in 2 hour period for best chance of ovulation

18
Q

mating behavior in cats

A

Tom mounts and grasps queen’s neck. queen vocalizes with intromission. separation, queen licks, rolls and is aggressive toward male

19
Q

anatomy of a cat during postestrus or interestrus

A

follicular regression

20
Q

hormonal effect of a cat in postestrus or interestrus

A

no estrogen or progesterone!!

21
Q

length of diestrus in a cat

A

pregnant - 2 months

non-pregnant - 40 - 50 days

22
Q

behavior of a cat in diestrus

A

not receptive to mating

23
Q

anatomy of a cat during diestrus

A

CL; ovulation must have occurred

24
hormonal effect of a cat in diestrus
progesterone
25
options of what can happen after estrus in a cat: (3)
1. no ovulation --> interestrus/postestrus 2. ovulation --> does not get pregnant --> diestrus 3. ovulation --> then pregnant --> diestrus
26
length of anestrus in the cat
during fall and winter
27
behavior of a cat in anestrus
not receptive to mating
28
anatomy of a cat in anestrus
inactive ovaries
29
hormonal effects of the cat in anestrus
no estrogen or progesterone
30
cornification status of a cat in anestrus
no vaginal cornification
31
where does progesterone come from during pregnancy
the CL
32
what hormone may be used to detect pregnancy in the cat?
relaxin from the placenta
33
fun fact about pregnancy in cats
queens can show estrus during pregnancy!
34
what is the effect of relaxin in cats?
may promote prolactin release
35
what is the effect of prolactin in pregnant cats?
it is luteotrophic (stimulates formation of the CL) and may support the CL's of pregnancy - longer pregnant diestrus than non-pregnant
36
what type of placentation do cats have?
zonary, endotheliochorial, deciduate
37
parturition in the cat is similar to what other animal
the sheep
38
describe stage I of parturition in the cat
nesting, pacing purring
39
stage II of parturition in the cat
queen may cry out with fetal passage | - takes several hours to a day
40
stage III of parturition in the cat
fetal membrane expulsion
41
superfecundation
a litter has more than 1 father. some oocytes fertilized by 1 male, others by another - both BITCHES & QUEENS can be bred by multiple males during their estrus
42
superfetation
when an ALREADY pregnant female is bred and another conception event occurs - litters with different neonate sizes are more likely due to arrested development due to differential placental attachment or anoalies, disease, etc. ...not sure if its legit....