Lecture 20: Feline Repro (Kelleman) Flashcards Preview

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Flashcards in Lecture 20: Feline Repro (Kelleman) Deck (43):
0

when is heat for cats?

proestrus and estrus

1

when do cats reach puberty?

as early as 4 months

2

what type of cycle do cats have?

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

3

what is the seasonality of cats?

they are long-day seasonally polyestrus breeders

4

parts of the estrous cycle in cats

proestrus
estrus
postestrus or interestrus
diestrus
anestrus

5

do cats have pre-ovulatory progesterone?

no!

6

do cats have vulvar discharge?

no!

7

length of proestrus

short - may not be observed

8

behavior of cat during proestrus

attractive to male, will not allow mating; affectionate

9

anatomy of a cat during proestrus

ovarian follicular growth

10

hormonal effect of proestrus in cats

estrogen is HIGH

11

length of estrus in cats

variable, several days to 2 weeks

12

behavior of cats in estrus

attractive to male, allows mating; affectionate

13

anatomy of a cat during estrus

ovarian follicular growth

14

hormonal effect of a cat in estrus

estrogen PEAKS

15

Ovulation in cats

Induced ovulator!
induced by coitus
occasionally spontaneous

16

how is ovulation induced?

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

17

what is the best chance of ovulation in cats?

4 matings in 2 hour period for best chance of ovulation

18

mating behavior in cats

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

19

anatomy of a cat during postestrus or interestrus

follicular regression

20

hormonal effect of a cat in postestrus or interestrus

no estrogen or progesterone!!

21

length of diestrus in a cat

pregnant - 2 months
non-pregnant - 40 - 50 days

22

behavior of a cat in diestrus

not receptive to mating

23

anatomy of a cat during diestrus

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....

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