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Flashcards in Estrous Cycle of Swine Deck (41)
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1

What type of breeders are pigs?

Non-seasonal polyestrus

2

What is the estrus cycle length of a pig?

21d

3

When do pigs reach puberty?

5-7mo (210-240lb)

4

When is a pig first bred?

7-8mo (220-250lb)

5

How long does proestrus last in a pig?

4-5d

6

How long is estrus in a pig?

2-3d

7

When does ovulation occur in a pig?

24-48h after onset of estrus

8

When is optimal breeding time for a pig?

12-30h after onset of estrus

9

When should mating occur in order to maximize conception rates?

12h prior to ovulation

10

Why do environment and comfort influence sow breeding?

Heat stress causes seasonal anestrus

11

What is the duration of diestrus in a pig?

14d

12

When will the CL become responsive to PGF during diestrus?

After 12d of diestrus (so there's no point to short cycle a sow)

13

How soon after weaning estrus occur?

3-9d

14

What reproductive clinical signs are assoc. w/porcine parvoviurs?

SMEDI

15

Porcine parvo infection @ <30d gestation results in what?

Embryo resorption

16

Porcine parvo infection @ 30-70d gestation results in what?

Mummification

17

Porcine parvo infection @ >70d gestation results in what?

Dead or weak piglets

18

How do you dx porcine parvovirus?

IFA of mummy or by rising titer in sow

19

How can you control porcine parvovirus?

Comingle gilts and sows, pre-breeding vax

20

What is the most relevant Lepto serovar for swine reproduction?

L. interrogans pomona

21

What are clinical signs of Lepto?

Pyrexia, still births, last trimester abortions

22

How do you treat Lepto?

Tetracycline in feed, vaccinate

23

What disease causes premature farrowing, small/weak piglets, stillborns and mummies, and delayed/abnormal estrus?

PRRS

24

How do you diagnose PRRS?

Serology

25

How do you prevent PRRS?

Vaccination (not super effective)

26

What type of virus is PRRS?

RNA

27

What disease causes abortion at any time of gestation and infertiligy?

Brucella suis

28

What lesions will you see in pigs with Brucella suis?

Arthritis and orchitis

29

Which reproductive disease of pigs is zoonotic?

Brucellosis

30

What is a reliable sign of estrus in pigs?

Sow stands to be mounted