Measures of Estrus Detection and Pregnancy in Dairy Cows After Administration of Gonadotropin-Releasing Hormone Within an Estrus Synchronization Program Based on Prostaglandin F2α

The objective of this study was to assess the use of GnRH in a controlled breeding program (7 d prior to the second of two injections of PGF2α, 14 d apart) as a means to improve the expression and detection of estrus, first service conception rate, and overall pregnancy rate of lactating dairy cows....

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Veröffentlicht in:	Journal of dairy science 1998-02, Vol.81 (2), p.375-381
Hauptverfasser:	LeBlanc, Stephen J., Leslie, Ken E., Ceelen, Henry J., Kelton, David F., Keefe, Gregory P.
Format:	Artikel
Sprache:	eng
Schlagworte:	Animal productions Animals ARTIFICIAL INSEMINATION Biological and medical sciences BREEDING METHODS Cattle - physiology CONCEPTION RATE controlled breeding DAIRY COWS Dinoprost - administration & dosage Dinoprost - pharmacology Estrus Detection Estrus Synchronization Female Fundamental and applied biological sciences. Psychology GNRH GONADOTROPIN RELEASING HORMONE Gonadotropin-Releasing Hormone - administration & dosage Gonadotropin-Releasing Hormone - pharmacology Hormone metabolism and regulation Insemination, Artificial - veterinary Mammalian female genital system OESTROUS CYCLE POSTPARTUM INTERVAL Pregnancy PREGNANCY RATE Pregnancy Tests prostaglandin F2α PROSTAGLANDINS PUERPERIUM REPEAT BREEDERS REPRODUCTIVE PERFORMANCE SEXUAL BEHAVIOUR STANDING REFLEX SYNCHRONIZATION Terrestrial animal productions Vertebrates Vertebrates: reproduction
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