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Biology of Animal Production 1 > Beef Cow Reproduction > Flashcards

Beef Cow Reproduction Flashcards

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1
Q

Gestation Length

A

283 days

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2
Q

Calving Interval Length

A

365 days

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3
Q

Estrous Length

A

21 days

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4
Q

Estrus

A

15-18 hours
-stand to be mounted

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5
Q

Uterine Torsion

A

uterus twists in cow

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6
Q

Retained Placenta

A

placenta doesn’t pass within 8-12 hours

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7
Q

Prolapse

A

inversion of uterus or vagina

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8
Q

Calving Season Bull Management

A

cow per bull
-yearling: 12-15 animals
-seasoned bull: up the amount

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9
Q

Brucellosis

A

Bang’s Disease
-MO brucellosis free b/c of irradiation program in 1954
-zoonotic through placental content and vaginal discharge
-cannot be cured

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10
Q

Leptospirosis

A

-South issues (unvaccinated)
-low grade uterine infection
–> can get pregnant but cannot maintain
-mastitis
-urine infects other cows

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11
Q

Vibriosis

A

-venereal disease
-bacteria in bulls prepuse
-cause infertility

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12
Q

IBR + BVD

A

-viral
-abortions and rep infections
IBR= infectious bovine rhinotracheitis
BVD= bovine viral diarrhea

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13
Q

Trichomoniasis

A

-protozoan - venereal disease (STD)
-pyometra – puss in the uterus

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14
Q

What trait has the highest economic importance of all traits?

A

Reproductive Performance

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15
Q

Post Partum Interval

A

PPI
-ideally 45-50 days

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16
Q

What causes a longer PPI?

A

-BCS of less than 4
-first calf-cow
-dystocia

17
Q

Uterus Involution

A

uterus must shrink to normal size
–> 30 days

18
Q

How to shorten PPI?

A

-expose cows to bulls
-use hormone injections

19
Q

Breeding Soundness Exam

A

30 days before breeding season
-examine: BCS, physical, scrotum and testes, semen

20
Q

Semen Evaluation

A

volume, concentration, motility, morphology

21
Q

CIDR

A

-timed AI
Controlled Internal Drug Release
-typically progesterone

22
Q

Embryo Transfer

A

super ovulate cows

Biology of Animal Production 1 (16 decks)

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