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Quiz von Marina Martins, aktualisiert more than 1 year ago
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Erstellt von Marina Martins
vor mehr als 5 Jahre
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Frage 1
Frage
Once a heifer has hit puberty, how often should she come into oestrus?
Antworten
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every 18-24 days
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every 24-30 days
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every 14-20 days
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every 30-36 days
Frage 2
Frage
How many weeks post-partum is a cow expected to return to oestrus?
Antworten
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4-6 weeks
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2-4 weeks
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immediately
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3-5 weeks
Frage 3
Frage
Which of the following is FALSE considering oestrus expression in cows?
Antworten
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Every single oestrus in fertile cows should have overt behavioural signs
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In high yield dairy cows, oestrus duration is thought to be less than 15 hours
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Oestrus expression requires the environment
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Sub-oestrus implies reduced oestrus expression
Frage 4
Frage
Ovsynch in dairy cows involves
Antworten
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Insertion of PRID/CIDR for 7-9 days with PGF2a injected 24 hr before removal of the device
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Two injections of PGF2a 11 days apart
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Injection of GnRH on day 0, then PGF2a 7 days later, then a final injection of GnRH at day 9
Frage 5
Frage
Which of the following is FALSE considering ovarian cysts?
Antworten
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They develop from anovulatory Graafian follicles
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They develop when the theca cell layer degenerates
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They are 2.5 cm in diameter
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They persist longer than 10 days
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They occur because of a failure of the pre-ovulatory LH surge after the end of the recovery period
Frage 6
Frage
Poor nutrition in dairy cows can influence fertility directly via
Antworten
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reducing IGF-1 production
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lowering milk progesterone values
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increasing insulin values
Frage 7
Frage
An ovarian cause for follicular cysts are reduced numbers of [blank_start]LH[blank_end] receptors in [blank_start]granulosa[blank_end] cells of cysts vs normal follicles.
Antworten
-
LH
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granulosa
Frage 8
Frage
Which of the following is FALSE when treating ovarian cysts?
Antworten
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Cows often develop cysts in the immediate postpoartum period but these regress spontaneously and don't need treatment
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Treat luteal cysts with two doses of PGF2a
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Treat follicular cysts with a dose of GnRH/hCG followed by PGF2a
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Treat follicular cysts with intra-vaginal CIDR/PRID for 10-12 days
Frage 9
Frage
Pyometra in cows is often associated with
Antworten
-
a persistent CL
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luteal cysts
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follicular cysts
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thickened ovaries
Frage 10
Antworten
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Uterine torsion
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Hydrosalphinx
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Pyometra
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Follicular ovarian cyst
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Luteal ovarian cyst
Frage 11
Antworten
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Luteal ovarian cyst
-
Follicular ovarian cyst
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Pyometra
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Persistent CL
Frage 12
Frage
Which of the following is NOT a way to prevent embryonic death in repeat breeders cows?
Antworten
-
Use semen from a bull with good fertility
-
Give hCG/GNRH at time of first AI
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Give GnRH 11-12 days after AI
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Place PRID device immediately after AI
Frage 13
Frage
Endometritis is clinically scored based on [blank_start]mucus character[blank_end] and [blank_start]mucus odour[blank_end].
Antworten
-
mucus character
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mucus odour
Frage 14
Frage
How would you treat endometritis in a cow if no CL is present?
Antworten
-
PGF2a
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Intrauterine cephalosporin
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GnRH
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Penicillin G
Frage 15
Frage
The average 600-day liveweight of Charolais bulls is 800kg. The heritability of liveweight is 0.4. What is the simple EBV for a Charolais bull that weighs 820kg at 600 days of age?
Antworten
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+4kg
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+8kg
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+10kg
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+12kg
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+20kg
Frage 16
Frage
A bull had a 600-day liveweight EBV of + 8kg. Imagine you mated this bull to a Charolais cow with a 600-day liveweight EBV of -2kg. What would be the simplistic 600-day EBV of the calf?
Antworten
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+0kg
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+1kg
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+2kg
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+3kg
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+4kg
Frage 17
Frage
Brucella abortus typically causes abortions in cows in
Antworten
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6-9 months
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5-7 months
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at any stage
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4-7 months
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usually late stage abortion
Frage 18
Frage
Which of the following can cause abortions in cows at any stage of pregnancy?
Antworten
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BVDV
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Brucella abortus
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Listeria
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Leptospira spp.
Frage 19
Frage
The voluntary waiting period for servicing cows should be at least
Antworten
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42 days
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36 days
-
50 days
-
65 days
Frage 20
Frage
What is the target number of days for the calving-to-first service interval?
Antworten
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65 days
-
80 days
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42 days
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50 days
-
75 days
Frage 21
Frage
What is the target conception rate at the first AI service of cows?
Antworten
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70%
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55%
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60%
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50%
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40%
Frage 22
Frage
When should a farmer see big peaks in inter-oestrus intervals of his dairy herd?
Antworten
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2-17 days after servicing
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18-24 days after servicing
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25-35 days after servicing
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36 to 48 days after servicing
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more than 48 days after servicing
Frage 23
Frage
A farmer measured the milk progesterone levels of a number of cows. Which cow's milk progesterone value suggests it's probably in oestrus?
Antworten
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4 ng/ml
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8 ng/ml
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11 ng/ml
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20 ng/ml
Frage 24
Frage
Which of the following is NOT a measurement of reproductive performance in sheep?
Antworten
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Fertility
-
Fecundity
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Survival Rate
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Foetal Growth
Frage 25
Frage
The number of lambs that are born per pregnancy is referred to as
Antworten
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Fertility
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Fecundity
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Survival rate
-
Conception Rate
Frage 26
Frage
If a farmer's flock contains a large number of ewes that birth only single lambs, this likely means his flock primarily has an issue with
Antworten
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poor ovulation rate
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poor conception rate
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high embryonic or early foetal loss
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high stillbirth rates
Frage 27
Frage
Which of the following would NOT cause a poor conception rate in sheep?
Antworten
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Breeding early in the breeding season
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Ovarian cysts
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Clover-rich pastures
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High environmental temperatures
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Mineral deficiency
Frage 28
Frage
In sheep, isoflavones can cause
Antworten
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poor conception rate
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poor ovulation rate
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early embryonic death
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late foetal death
Frage 29
Frage
How would you treat hydrometra in goats?
Antworten
-
PGF2a
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Oxytocin
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GnRH and Oxytocin
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PGF2a and Oxytocin
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GnRH and PGF2a
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GnRH
Frage 30
Frage
Which of the following would likely not cause early embryonic death?
Antworten
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Asynchrony between embryonic development and timing of the progesterone rise
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Underfeeding in early pregnancy
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Increased age of ewe
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Deficiency of selenium
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Deficiency of iodine
Frage 31
Frage
Placental insufficiency in late foetal death of lambs is likely caused by
Antworten
-
underfeeding in early pregnancy
-
overfeeding in early pregnancy
-
underfeeding in late pregnancy
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overfeeding in late pregnancy
Frage 32
Frage
Which of the following is the most common reason for late foetal death in sheep and goats?
Antworten
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Chlamydophila abortus
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Toxoplasmosis
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Campylobacter
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Brucellosis
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Leptospirosis
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Border Disease
Frage 33
Frage
[blank_start]NOS[blank_end] inhibitors like [blank_start]L-nitroarginine[blank_end] can correct poor mothering ability by preventing changes in neuronal circuits in the olfactory bulb.
Antworten
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NOS
-
L-nitroarginine
Frage 34
Frage
If you wanted to investigate the ovulation rate of a flock of sheep, which value(s) would you primarily look at it?
Antworten
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Nutrition
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Timing of ram use
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BCS
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Length of mating
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Stress
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