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A snapshot of the summary - Animal health, welfare and management
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Lactation
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Why did the milk production of dairy cows increase so much?More knowledge of food
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How does bad fertility effect the health of the cow indirectly?Farmers will replace the cow that won't get pregnant.
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Why is welfare and health of animals important?
- Economics and sustainability
- Intrinsic value
- Anthropomorism
- Comparitive neurophysiology
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Consequences of lactation for reproductive parameters of sows and cattle
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What happens in course of lactation in pigs?
- LH pool restores
- Antral follicle pool develops
- Pre- ovulatory LH surge mechanism develops
- Endometrium recovers/regenerates
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Why does the oocyte quality decrease?
- LH pool didn't restore due to NEB
- Antral follicle pool did not develop enough
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What are the consequences if the antral follicle pool does not develop enough?
- No bigger follicles --> Not enough oestradiol --> No LH surge --> No ovulation
- Low quality CL after ovulation --> less pogesterone --> less embryo growth
- No bigger follicles --> Not enough oestradiol --> No LH surge --> No ovulation
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What is the consequence of a decreasing oocyte quality?Smaller litters
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What are NEB associated hormones?Insulin, Leptin, IGF-1, (sow) NEFA, urea (cow)
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What do NEB associated hormones affect of the reproduction system?Ovaria and hypothalamus
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How can you prevent lactational consequences for fertility in sows?
- Stimulate feed intake
- Weaning management
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