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BVetMed3: Infertility in Large Animals
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Questions in this quiz (34)
1Once a heifer has hit puberty, how often should she come into oestrus?
- Aevery 18-24 days
- Bevery 24-30 days
- Cevery 14-20 days
- Devery 30-36 days
2How many weeks post-partum is a cow expected to return to oestrus?
- A4-6 weeks
- B2-4 weeks
- Cimmediately
- D3-5 weeks
3Which of the following is FALSE considering oestrus expression in cows?
- AEvery single oestrus in fertile cows should have overt behavioural signs
- BIn high yield dairy cows, oestrus duration is thought to be less than 15 hours
- COestrus expression requires the environment
- DSub-oestrus implies reduced oestrus expression
4Ovsynch in dairy cows involves
- AInsertion of PRID/CIDR for 7-9 days with PGF2a injected 24 hr before removal of the device
- BTwo injections of PGF2a 11 days apart
- CInjection of GnRH on day 0, then PGF2a 7 days later, then a final injection of GnRH at day 9
5Which of the following is FALSE considering ovarian cysts?
- AThey develop from anovulatory Graafian follicles
- BThey develop when the theca cell layer degenerates
- CThey are 2.5 cm in diameter
- DThey persist longer than 10 days
- EThey occur because of a failure of the pre-ovulatory LH surge after the end of the recovery period
6Poor nutrition in dairy cows can influence fertility directly via
- Areducing IGF-1 production
- Blowering milk progesterone values
- Cincreasing insulin values
7An 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.
- ALH
- Bgranulosa
8Which of the following is FALSE when treating ovarian cysts?
- ACows often develop cysts in the immediate postpoartum period but these regress spontaneously and don't need treatment
- BTreat luteal cysts with two doses of PGF2a
- CTreat follicular cysts with a dose of GnRH/hCG followed by PGF2a
- DTreat follicular cysts with intra-vaginal CIDR/PRID for 10-12 days
9Pyometra in cows is often associated with
- Aa persistent CL
- Bluteal cysts
- Cfollicular cysts
- Dthickened ovaries
10What reproductive pathology is shown in the image?
- AUterine torsion
- BHydrosalphinx
- CPyometra
- DFollicular ovarian cyst
- ELuteal ovarian cyst
11Which reproductive pathology is shown in the image?
- ALuteal ovarian cyst
- BFollicular ovarian cyst
- CPyometra
- DPersistent CL
12Which of the following is NOT a way to prevent embryonic death in repeat breeders cows?
- AUse semen from a bull with good fertility
- BGive hCG/GNRH at time of first AI
- CGive GnRH 11-12 days after AI
- DPlace PRID device immediately after AI
13Endometritis is clinically scored based on [blank_start]mucus character[blank_end] and [blank_start]mucus odour[blank_end].
- Amucus character
- Bmucus odour
14How would you treat endometritis in a cow if no CL is present?
- APGF2a
- BIntrauterine cephalosporin
- CGnRH
- DPenicillin G
15The 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?
- A+4kg
- B+8kg
- C+10kg
- D+12kg
- E+20kg
16A 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?
- A+0kg
- B+1kg
- C+2kg
- D+3kg
- E+4kg
17Brucella abortus typically causes abortions in cows in
- A6-9 months
- B5-7 months
- Cat any stage
- D4-7 months
- Eusually late stage abortion
18Which of the following can cause abortions in cows at any stage of pregnancy?
- ABVDV
- BBrucella abortus
- CListeria
- DLeptospira spp.
19The voluntary waiting period for servicing cows should be at least
- A42 days
- B36 days
- C50 days
- D65 days
20What is the target number of days for the calving-to-first service interval?
- A65 days
- B80 days
- C42 days
- D50 days
- E75 days
21What is the target conception rate at the first AI service of cows?
- A70%
- B55%
- C60%
- D50%
- E40%
22When should a farmer see big peaks in inter-oestrus intervals of his dairy herd?
- A2-17 days after servicing
- B18-24 days after servicing
- C25-35 days after servicing
- D36 to 48 days after servicing
- Emore than 48 days after servicing
23A farmer measured the milk progesterone levels of a number of cows. Which cow's milk progesterone value suggests it's probably in oestrus?
- A4 ng/ml
- B8 ng/ml
- C11 ng/ml
- D20 ng/ml
24Which of the following is NOT a measurement of reproductive performance in sheep?
- AFertility
- BFecundity
- CSurvival Rate
- DFoetal Growth
25The number of lambs that are born per pregnancy is referred to as
- AFertility
- BFecundity
- CSurvival rate
- DConception Rate
26If 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
- Apoor ovulation rate
- Bpoor conception rate
- Chigh embryonic or early foetal loss
- Dhigh stillbirth rates
27Which of the following would NOT cause a poor conception rate in sheep?
- ABreeding early in the breeding season
- BOvarian cysts
- CClover-rich pastures
- DHigh environmental temperatures
- EMineral deficiency
28In sheep, isoflavones can cause
- Apoor conception rate
- Bpoor ovulation rate
- Cearly embryonic death
- Dlate foetal death
29How would you treat hydrometra in goats?
- APGF2a
- BOxytocin
- CGnRH and Oxytocin
- DPGF2a and Oxytocin
- EGnRH and PGF2a
- FGnRH
30Which of the following would likely not cause early embryonic death?
- AAsynchrony between embryonic development and timing of the progesterone rise
- BUnderfeeding in early pregnancy
- CIncreased age of ewe
- DDeficiency of selenium
- EDeficiency of iodine
31Placental insufficiency in late foetal death of lambs is likely caused by
- Aunderfeeding in early pregnancy
- Boverfeeding in early pregnancy
- Cunderfeeding in late pregnancy
- Doverfeeding in late pregnancy
32Which of the following is the most common reason for late foetal death in sheep and goats?
- AChlamydophila abortus
- BToxoplasmosis
- CCampylobacter
- DBrucellosis
- ELeptospirosis
- FBorder Disease
33[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.
- ANOS
- BL-nitroarginine
34If you wanted to investigate the ovulation rate of a flock of sheep, which value(s) would you primarily look at it?
- ANutrition
- BTiming of ram use
- CBCS
- DLength of mating
- EStress
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