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Theriogenology > Swine Repro > Flashcards

Swine Repro Flashcards

1
Q

T/F: Sow ovaries develop multiple follicles

A

True; they’re litter-bearing

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2
Q

When do pigs rech puberty?

A

5-8mo

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3
Q

What is the most commonly used method to hasten puberty in gilts?

A

Boar effect; have a boar around

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4
Q

How long is gestation in a sow?

A

115d

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5
Q

Sows are ___ (monoestrus/polyestrus) and ___ (seasonal/non-seasonal)

A

Polyestrus

Non-seasonal

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6
Q

What is the length of estrus cycle?

A

21d (same as sheep and goats)

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7
Q

How long is estrus in pigs?

A

36-72h

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8
Q

How long after estrus begins should a sow bred?

A

24h

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9
Q

Estrus occurs ___ d post-weaning

A

4-7

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10
Q

What hormones are given to non-cycling gilts? (2)

A

PMSG

HCG

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11
Q

What happens if pigs are fed less than the recommended 15-20mg/hd/d of Atrenogest?

A

Cystic ovaries, gone from herd (cannot produce again)

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12
Q

When is the fetus immunocompetent?

A

70-75d

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13
Q

How long is gestation in sows?

A

3months, 3 weeks, 3 days

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14
Q

What is the number one test for pregnancy in gilts/sows?

A

Non-return to estrus in 18-24d

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15
Q

What is stage one of farrowing?

A

Cervical dilation, 2-12h

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16
Q

What is stage two of farrowing?

A

Myometrial contractions, fetal expulsion, 2-4h, piglet every 15 min

17
Q

What is stage three of farrowing?

A

Fetal membrane expulsion, retained placenta is rare

18
Q

What drug should not be given in dystocias where there is an obstruction?

A

Oxytocin

19
Q

What is given to pigs to induce parturition?

A

Prostaglandins

20
Q

How long do pigs lactate for?

A

3-4wk

21
Q

What is mastitis-metritis-agalactia complex?

A

Piglets can’t feed, starve
Sow becomes thin, cannot stand
Due to LPS/Endotoxemia

22
Q

What is the most common cause of infertility in sows?

A

Hydrosalpinx

Theriogenology (8 decks)

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