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Repro 1 > exam 3 - PDing > Flashcards

exam 3 - PDing Flashcards

1
Q

4 ways of synchronising estrus

A

1 - inhibit LH secretion with progesterone
2 - shorten CL lifespan with PGF2a
3 - manage follicular development with GnRH, FSH, LH, eCG etc
4 - combination

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2
Q

synchronisation rate

A

percentage of females detected in estrous compared to the total number of synchronised cows

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3
Q

conception rate

A

percentage of females pregnant compared to number of females inseminated

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4
Q

pregnancy rate

A

percentage of females pregnant compared to total number of synchronised females

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5
Q

inhibition of LH synchronisation

A

use progesterone, LH inhibited, after progesterone removal, follicular growth, estrus and ovulation occurs in 2-8d

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6
Q

shortening CL lifespan synchronisation

A

PGF2a 5d post ovulation then another 11-14d later, estrus will be 3-5d later so AI 72h after second shot if no signs of estrus

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7
Q

ovsynch

A

give GnRH
give PGF2a 7d later
give GnRH 56-60h later
fixed AI 16-20h later
first GnRH will induce ovulation or atresia of dominant follicle, allowing new wave 1-2d later

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8
Q

extra embryonic membranes

A

yolk sac
chorion
amnion
allantois

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9
Q

placenta in mare

A

diffusa epitheliochorialis (6 layers)

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10
Q

placenta in sow

A

diffusa epitheliochorialis (6 layers)

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11
Q

placenta in bitch and queen

A

zonaria endotheliochorialis (5 layers)

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12
Q

placenta in ruminants

A

cotyledonaria sinepitheliochorialis (6 layers)

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13
Q

placenta in primates

A

discoidalis hemochorialis

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14
Q

when and how can you tell sex of foetus in mare

A

d 90 by looking at genital tuberculum

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15
Q

PD US in bitch

A

d18-20 = vesicles
d24-28 = heart beat

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16
Q

PD abdo palpation in bitch

A

d18-21 oval distensions in horns
d28-30 spherical distension
d50 foetuses

17
Q

PD queen

A

US - d14 conceptus
d21 heartbeat

18
Q

when to do x ray for bitch PD

A

d45-50 after ossification to count number of pups

19
Q

how to check between pregnancy and pseudopregnancy

A

relaxin kit on d22-27

20
Q

rectal US PD cow

A

ovaries hard to palpate after d150
d35 - asymmetry of gravid horn, vesicle
d45 - chorioallantois with fetal membrane slip
2-3 months - large horn and 15cm foetus
d90-term - fremitus of middle uterine artery on left caudal pelvis
5-6month = negative phase of pregnancy
8-9m - foetus, measure metacarpus and placentomes

21
Q

heart beat in cow

A

from d20-25, 30 more accurate

22
Q

lab tests PD cow

A

oestrogen - d105
progesterone - take 21d after estrus, 100% for absence
EPF - 3d after AI
PL - from d160
pregnancy specific protein B - from d28-90ish
prolactin - peaks 20h before parturition

23
Q

vaginal exam PD cow

A

d60 - cervical seal
external cervix opening directed laterodorsal

24
Q

rectal exam PD mare

A

d17 - uterus toned, conceptus
d40 - embryo 6cm, ventral
3m - uterus over pelvic brim, fremitus
5-6m - negative phase
7-8m - palpate fetus, measure cranium and fetlock

25
Q

US PD mare

A

d9/11 - vesicle
d16- vesicle 19-24mm
d20- embryo
d24 - heartbeat
d59-68 - fetal sexing

26
Q

lab tests PD mare

A

eCG - in blood d38 post ovulation, max d60, gone d150
progesterone - d150
estrogen - in serum d60

27
Q

vaginal exam PD mare

A

d14 - mucosa pale pink, cervix small and points eccentrically, opening of cervix gradual filled with mucus plug

28
Q

high frequency US means

A

less penetration but better resolution -for rectal

29
Q

low frequency US means

A

better penetration but low resolution - for abdo

30
Q

when to test for progesterone for PD

A

1 estrus cycle length after AI

31
Q

PD US ewe and doe

A

doppler US d40-80
US rectal d21-50
US abdo best d45-50

32
Q

PD estrogen Ewę and doe

A

ewe - d30
doe d50

33
Q

rectal PD sow

A

d80 - fremitus
d40 - horns can’t be retracted in to pelvis
d30 - ampulles on horns

34
Q

vaginal PD sow

A

biopsy - pregnant has 2-3 layers of epithelial cells without nuclei

35
Q

suitest PD sows

A

give estradiol and testosterone 8-18d post AI, non-pregnant will be in estrus 2-5d later

36
Q

US PD sows

A

d30-40 abdo
d18 rectal

Repro 1 (3 decks)

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