Cattle Reproduction

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Cattle Reproduction

• Jason Ahola
• PhD Graduate Student
• Department of Animal Sciences
• Colorado State University

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Cows Reproductive Cycle
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Anatomy
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Physiology
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Ovary
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Corpus Luteum
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Insemination Timeline
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Synchronization
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Single Injection w/ Post-Breeding
Inject PGF2?
Turn in Bulls
Day 0
Day 5
Check for estrus and inseminate
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Select Synch
GnRH injection
PGF2? injection
Day 0
Day 7
Check for heat and breed Day 6 to12
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MGA-GnRH-PG (MGA Select)
Turn in Bulls
Inject PGF2?
Inject GnRH
Feed MGA 0.5 mg/hd/d
Day 0
Day 14
Day 33
Day 36
Day 24
Sub-fertile heat
Check for estrus and inseminate.
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Comparing the Options
Treatment
Estrus Response Pregnancy Rate
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Heat Detection
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Chin Ball Markers
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KaMar/ Bovine Beacon
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Tail Paint
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Tail Paint
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Heat Watch
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