Mating, Pregnancy and Birth Flashcards Preview

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Flashcards in Mating, Pregnancy and Birth Deck (64)
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1

What factors should be considered before breeding animals?

Clinically healthy
Suitable age- mature skeleton, old enough to assess temperament
Good temperament
No hereditary or infectious disease
vaccinated

2

Define monoestrus

One oestrus cycle each breeding season

3

Define seasonally polyoestrus

Cycles as long as season or until gets pregnant

4

Define anoestrus

Cessation of reproductive activity

5

What is the role of LH?

Stimulates ovulation and development of corpus luteum

6

When does cyclical activity begin in dogs and when is usually their first season?

6-23 months, 6 months after adult weight and height reached
First oestrus at 12-24 months

7

How long do canine seasons typically last and what type of seasons do they have?

3 weeks
7 months between each
Seasonally monoestrus with 1-2 breeding seasons a year

8

What happens in pro-oestrus in dogs and how long does it last?

Increased oestrogen release from follicles causes outward signs of oestrus that attract males but female not receptive
FSH cause egg development in follicles
9 days

9

What are the signs of pro-oestrus in dogs?

Serosanguinous vulval discharge containing blood
Swollen vulva

10

What is oestrus in dogs and how long does it last?

Female receptive and displays sexual behaviour and light pink discharge from soft vulva
Oestrogen declines
LH peaks from declining oestrogen causing follicles to rupture and egg to release
Corpus luteum begin to develop
9 days with mating on day 3-5

11

What happens in metoestrus in dogs?

High levels of progesterone to form placenta and maintain pregnancy
Ends cycle by inhibiting FSH and LH

12

How long does metoestrus last in dogs?

60 days whether pregnant or not

13

What hormonal changes take place when birth occurs in dogs?

Progesterone drops

14

What is pseudopregnancy?

Prolactin produced developing mammary tissue
Progesterone stays at levels similar to if pregnant as prolactin stimulates production from corpus luteum

15

How long does anoestrus last in dogs?

90-150 days

16

What is anoestrus in dogs and what are associated hormones?

No sexual behaviour or interest
Low levels of progesterone
FSH level increases to mature follicles

17

When do cats have their first oestrus?

At 6-9 months but affected by photoperiod so have oestrus in spring

18

What type of oestrus cycle do cats have and how do they ovulate?

Seasonally polyoestrous, oestrus every 14-21 days while in season
Induced ovulators

19

How long does pro-oestrus last in cat and what is it?

Male attracted to female but female not receptive
LH and FSH high
2-3 days

20

What is the outwards sign of oestrus in cats?

Bloody discharge but usually cleaned away

21

How long does oestrus last in cats?

7 days

22

What are the signs of oestrus in cats?

Standing for mating
Calling
Spine lordosis
Rubbing on objects
High oestrogen

23

What happens if cats ovulation isn't stimulated?

Interoestrus
Quiet period of 2-14 days before returning to pro-oestrus

24

What hormonal changes take place in cats when ovulation induced?

LH releases egg
Corpus luteum secretes progesterone, maintained by placenta in pregnancy

25

What is anoestrus and when does it take place in cats?

Inactive ovaries in winter

26

What is metoestrus in cats and how long does it last?

Non-fertile mating causes pseudopregnancy as corpus luteum releases progesterone at similar levels to pregnancy
45 days long

27

What happens after metoestrus in cats?

Either re enter cyclical activity or enter anoestrus

28

Define paraphimosis

Constriction of female prepuce around engorged penis so it cant be retracted back to the female prepuce

29

Define flagging

Bitch standing with deviated tail when ready to mate

30

Define tie

Mating process stage in dogs where vagina muscles contract around penis to stop it withdrawing