17626864
Descrição
Quiz por Marina Martins, atualizado more than 1 year ago
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Criado por Marina Martins
mais de 5 anos atrás
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Questão 1
Questão
Once a heifer has hit puberty, how often should she come into oestrus?
Responda
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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
Questão 2
Questão
How many weeks post-partum is a cow expected to return to oestrus?
Responda
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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
Questão 3
Questão
Which of the following is FALSE considering oestrus expression in cows?
Responda
-
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
Questão 4
Questão
Ovsynch in dairy cows involves
Responda
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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
Questão 5
Questão
Which of the following is FALSE considering ovarian cysts?
Responda
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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
Questão 6
Questão
Poor nutrition in dairy cows can influence fertility directly via
Responda
-
reducing IGF-1 production
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lowering milk progesterone values
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increasing insulin values
Questão 7
Questão
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.
Responda
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LH
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granulosa
Questão 8
Questão
Which of the following is FALSE when treating ovarian cysts?
Responda
-
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
Questão 9
Questão
Pyometra in cows is often associated with
Responda
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a persistent CL
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luteal cysts
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follicular cysts
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thickened ovaries
Questão 10
Questão
What reproductive pathology is shown in the image?
Responda
-
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
Questão 11
Questão
Which reproductive pathology is shown in the image?
Responda
-
Luteal ovarian cyst
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Follicular ovarian cyst
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Pyometra
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Persistent CL
Questão 12
Questão
Which of the following is NOT a way to prevent embryonic death in repeat breeders cows?
Responda
-
Use semen from a bull with good fertility
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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
Questão 13
Questão
Endometritis is clinically scored based on [blank_start]mucus character[blank_end] and [blank_start]mucus odour[blank_end].
Responda
-
mucus character
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mucus odour
Questão 14
Questão
How would you treat endometritis in a cow if no CL is present?
Responda
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PGF2a
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Intrauterine cephalosporin
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GnRH
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Penicillin G
Questão 15
Questão
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?
Responda
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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
Questão 16
Questão
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?
Responda
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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
Questão 17
Questão
Brucella abortus typically causes abortions in cows in
Responda
-
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
Questão 18
Questão
Which of the following can cause abortions in cows at any stage of pregnancy?
Responda
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BVDV
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Brucella abortus
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Listeria
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Leptospira spp.
Questão 19
Questão
The voluntary waiting period for servicing cows should be at least
Responda
-
42 days
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36 days
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50 days
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65 days
Questão 20
Questão
What is the target number of days for the calving-to-first service interval?
Responda
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65 days
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80 days
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42 days
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50 days
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75 days
Questão 21
Questão
What is the target conception rate at the first AI service of cows?
Responda
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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%
Questão 22
Questão
When should a farmer see big peaks in inter-oestrus intervals of his dairy herd?
Responda
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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
Questão 23
Questão
A farmer measured the milk progesterone levels of a number of cows. Which cow's milk progesterone value suggests it's probably in oestrus?
Responda
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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
Questão 24
Questão
Which of the following is NOT a measurement of reproductive performance in sheep?
Responda
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Fertility
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Fecundity
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Survival Rate
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Foetal Growth
Questão 25
Questão
The number of lambs that are born per pregnancy is referred to as
Responda
-
Fertility
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Fecundity
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Survival rate
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Conception Rate
Questão 26
Questão
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
Responda
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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
Questão 27
Questão
Which of the following would NOT cause a poor conception rate in sheep?
Responda
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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
Questão 28
Questão
In sheep, isoflavones can cause
Responda
-
poor conception rate
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poor ovulation rate
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early embryonic death
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late foetal death
Questão 29
Questão
How would you treat hydrometra in goats?
Responda
-
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
Questão 30
Questão
Which of the following would likely not cause early embryonic death?
Responda
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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
Questão 31
Questão
Placental insufficiency in late foetal death of lambs is likely caused by
Responda
-
underfeeding in early pregnancy
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overfeeding in early pregnancy
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underfeeding in late pregnancy
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overfeeding in late pregnancy
Questão 32
Questão
Which of the following is the most common reason for late foetal death in sheep and goats?
Responda
-
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
Questão 33
Questão
[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.
Responda
-
NOS
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L-nitroarginine
Questão 34
Questão
If you wanted to investigate the ovulation rate of a flock of sheep, which value(s) would you primarily look at it?
Responda
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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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