Success of artificial insemination based on expression of estrus and the addition of GnRH to an estradiol/progesterone-based protocol on pregnancy rates in lactating dairy cows

Success of artificial insemination based on expression of estrus and the addition of GnRH to an estradiol/progesterone-based protocol on pregnancy rates in lactating dairy cows

Three experiments evaluated the effects of insemination based on estrus expression or treatment with GnRH, on the time of ovulation and pregnancy rates to AI (P/AI) in dairy cows. All cows were treated with a P4 device for 8 d, estradiol benzoate at device insertion and prostaglandin F2α, estradiol...

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Veröffentlicht in:Animal reproduction science 2022-03, Vol.238, p.106954-106954, Article 106954
Hauptverfasser: Tschopp, Juan Carlos, Bó, Gabriel A.
Format: Artikel
Sprache:eng
Schlagworte:
Animals
Cattle
Dairy cows
Dinoprost - pharmacology
Estradiol - pharmacology
Estrus
Estrus Synchronization - methods
Female
Gonadotropin-Releasing Hormone - pharmacology
Insemination, Artificial - methods
Insemination, Artificial - veterinary
Lactation
Ovulation
Pregnancy
Pregnancy Rate
Progesterone - pharmacology
Timed AI
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Zusammenfassung:Three experiments evaluated the effects of insemination based on estrus expression or treatment with GnRH, on the time of ovulation and pregnancy rates to AI (P/AI) in dairy cows. All cows were treated with a P4 device for 8 d, estradiol benzoate at device insertion and prostaglandin F2α, estradiol cypionate and eCG at device removal. In Experiment 1, P/AI was less (P 
ISSN:0378-4320
1873-2232
DOI:10.1016/j.anireprosci.2022.106954