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Repro > Porcine > Flashcards

Porcine Flashcards

1
Q

What pattern is the cervix

A

interdigitating prominences (spiral like)

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2
Q

T/F: the cervial structures require an adapted penis/AI catheter to be traversed

A

T

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3
Q

What is the avg size of ovulatory follicles

A

8-12mm

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4
Q

___ is produced by the ovary and contributes to estrous behavior and morphological changes to the uterus

A

estradiol

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5
Q

What type of cycle/breeding do sows demonstrate

A

nonseasonal polyestrus

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6
Q

What is the avg length of a sows estrus cycle

A

21 days

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7
Q

When is the 1st attempt at AI conducted?

A

the sows 2nd or 3rd heat

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8
Q

How long is gestation

A

3mo 3wks 3 days (113-115 days)

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9
Q

T/F: lactation/nursing has no effect on the estrus cycle

A

false, nursing sows experiences anestrus

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10
Q

What is the average weaning to return to estrus period

A

4days

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11
Q

How many oocytes on avg are ovulated with each estrus cycle

A

15-30

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12
Q

How long does diestrus/the CL last?

A

14days

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13
Q

When does the CL respond to prostaglandin?

A

only after day 11-12

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14
Q

T/F: the sow has a long proestrus

A

true

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15
Q

How long is a sows proestrus period

A

4 days

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16
Q

what is the avg length of an estrus period

A

1-4 days

17
Q

When does ovulation happen/when should you attempt AI

A

on the 2nd day of estrus (36-44 hours after onset)

18
Q

When is gilt puberty onset?

A

~6mo

19
Q

When is the first breed of a gilt?

A

~7mo

20
Q

What are 3 unique things to a boars anatomy compared to other large animals

A

there is no ampulla
corkscrew glans
preputial diverticulum

21
Q

What is the avg vol of ejaculate

A

100-300mls

22
Q

When does the embryo enter the uterus

A

day 3

23
Q

When does the embryo migrate/spread out across the horn after entering the uterus

A

day 7

24
Q

What day does maternal recognition occur

A

day 11-12

25
Q

what is unique to sow maternal recognition of pregnancy

A

the embryo produces estradiol
estradiol reroutes PGF2alpha to uterine lumen
the PGF2alpha is destroyed in the lumen and cannot enter circulation to reach the ovary and cause lutinization of the ovary

26
Q

T/F: sow pregnancy is CL depended

A

T

27
Q

What type of placenta does the sow have?

A

diffuse epitheliochorial

28
Q

How long does stage 2 of parturition usually last?

A

1-6 hours

29
Q

T/F: stillbirths are common but mummies are pathogenic

A

false, both can be normal

30
Q

What is the breeding goal of sows

A

2 litters/year/sow

31
Q

When would you rebreed a postpartum sow

A

at the 1st postweaning estrus ~4wks

32
Q
A

Repro (5 decks)

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