17626864
Descripción
Test por Marina Martins, actualizado hace más de 1 año
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Creado por Marina Martins
hace más de 5 años
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Pregunta 1
Pregunta
Once a heifer has hit puberty, how often should she come into oestrus?
Respuesta
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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
Pregunta 2
Pregunta
How many weeks post-partum is a cow expected to return to oestrus?
Respuesta
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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
Pregunta 3
Pregunta
Which of the following is FALSE considering oestrus expression in cows?
Respuesta
-
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
Pregunta 4
Pregunta
Ovsynch in dairy cows involves
Respuesta
-
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
Pregunta 5
Pregunta
Which of the following is FALSE considering ovarian cysts?
Respuesta
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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
Pregunta 6
Pregunta
Poor nutrition in dairy cows can influence fertility directly via
Respuesta
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reducing IGF-1 production
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lowering milk progesterone values
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increasing insulin values
Pregunta 7
Pregunta
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.
Respuesta
-
LH
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granulosa
Pregunta 8
Pregunta
Which of the following is FALSE when treating ovarian cysts?
Respuesta
-
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
Pregunta 9
Pregunta
Pyometra in cows is often associated with
Respuesta
-
a persistent CL
-
luteal cysts
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follicular cysts
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thickened ovaries
Pregunta 10
Pregunta
What reproductive pathology is shown in the image?
Respuesta
-
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
Pregunta 11
Pregunta
Which reproductive pathology is shown in the image?
Respuesta
-
Luteal ovarian cyst
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Follicular ovarian cyst
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Pyometra
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Persistent CL
Pregunta 12
Pregunta
Which of the following is NOT a way to prevent embryonic death in repeat breeders cows?
Respuesta
-
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
Pregunta 13
Pregunta
Endometritis is clinically scored based on [blank_start]mucus character[blank_end] and [blank_start]mucus odour[blank_end].
Respuesta
-
mucus character
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mucus odour
Pregunta 14
Pregunta
How would you treat endometritis in a cow if no CL is present?
Respuesta
-
PGF2a
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Intrauterine cephalosporin
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GnRH
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Penicillin G
Pregunta 15
Pregunta
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?
Respuesta
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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
Pregunta 16
Pregunta
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?
Respuesta
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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
Pregunta 17
Pregunta
Brucella abortus typically causes abortions in cows in
Respuesta
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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
Pregunta 18
Pregunta
Which of the following can cause abortions in cows at any stage of pregnancy?
Respuesta
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BVDV
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Brucella abortus
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Listeria
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Leptospira spp.
Pregunta 19
Pregunta
The voluntary waiting period for servicing cows should be at least
Respuesta
-
42 days
-
36 days
-
50 days
-
65 days
Pregunta 20
Pregunta
What is the target number of days for the calving-to-first service interval?
Respuesta
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65 days
-
80 days
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42 days
-
50 days
-
75 days
Pregunta 21
Pregunta
What is the target conception rate at the first AI service of cows?
Respuesta
-
70%
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55%
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60%
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50%
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40%
Pregunta 22
Pregunta
When should a farmer see big peaks in inter-oestrus intervals of his dairy herd?
Respuesta
-
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
Pregunta 23
Pregunta
A farmer measured the milk progesterone levels of a number of cows. Which cow's milk progesterone value suggests it's probably in oestrus?
Respuesta
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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
Pregunta 24
Pregunta
Which of the following is NOT a measurement of reproductive performance in sheep?
Respuesta
-
Fertility
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Fecundity
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Survival Rate
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Foetal Growth
Pregunta 25
Pregunta
The number of lambs that are born per pregnancy is referred to as
Respuesta
-
Fertility
-
Fecundity
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Survival rate
-
Conception Rate
Pregunta 26
Pregunta
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
Respuesta
-
poor ovulation rate
-
poor conception rate
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high embryonic or early foetal loss
-
high stillbirth rates
Pregunta 27
Pregunta
Which of the following would NOT cause a poor conception rate in sheep?
Respuesta
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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
Pregunta 28
Pregunta
In sheep, isoflavones can cause
Respuesta
-
poor conception rate
-
poor ovulation rate
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early embryonic death
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late foetal death
Pregunta 29
Pregunta
How would you treat hydrometra in goats?
Respuesta
-
PGF2a
-
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
Pregunta 30
Pregunta
Which of the following would likely not cause early embryonic death?
Respuesta
-
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
Pregunta 31
Pregunta
Placental insufficiency in late foetal death of lambs is likely caused by
Respuesta
-
underfeeding in early pregnancy
-
overfeeding in early pregnancy
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underfeeding in late pregnancy
-
overfeeding in late pregnancy
Pregunta 32
Pregunta
Which of the following is the most common reason for late foetal death in sheep and goats?
Respuesta
-
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
Pregunta 33
Pregunta
[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.
Respuesta
-
NOS
-
L-nitroarginine
Pregunta 34
Pregunta
If you wanted to investigate the ovulation rate of a flock of sheep, which value(s) would you primarily look at it?
Respuesta
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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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