Results 81 to 90 of about 708 (172)

Effects of different doses of human chorionic gonadotropin at timed artificial insemination on the fertility of lactating dairy cows

Bulgarian Journal of Veterinary Medicine
The aim was to investigate the effects of administering GnRH and low (1650 IU) or high (3300 IU) doses of human chorionic gonadotropin (hCG) at timed artificial insemination (TAI) on the rates of ovulation and pregnancy in lactating dairy cows.
M. Mashayekhi, M. Goli
doaj   +1 more source

Changing the route of GnRH administration according to the initial cyclic phase of the Ovsynch protocol may optimize reproductive outcomes in dairy cows. [PDF]

BMC Vet Res
Abay M, Uyanık G, Akçay A, Canooğlu E, Gürbulak K, Bekyürek T, Demiral ÖO.   +6 more
europepmc   +1 more source

Risk factors for early and mid-to-late pregnancy loss and their effects on reproductive performance in dairy cows. [PDF]

J Vet Sci
Kang HG, Jeong JK, Kim IH.
europepmc   +1 more source

Foundational reproduction programs for U.S. dairy herds. [PDF]

J Reprod Dev
Fricke PM, Lauber MR, Wiltbank MC, Hincapie N.   +3 more
europepmc   +1 more source

Augmented-OvSynch enhances estrus resumption, luteal function, and conception rates in postpartum Zebu crossbred cows under tropical smallholder systems. [PDF]

Vet World
Kumar S, Pande M, Saha S, Chand N, Prasad N, Arya S, Mahajan S, Singh U, Dubey SK, Mohanty AK.   +9 more
europepmc   +1 more source

Effect of ?-carotene on Ovarium Functions and Ovsynch Success in Repeat Breeder Cows

, 2009
This study was carried out to determine the effect of beta-carotene on ovarian function and pregnancy rates in repeat breeder cows. Twenty-six repeat breeder Holstein cows were randomly assigned into control (n=11) and carotene (n=15) groups. Cows were fed with diet in the form of total mixed ration (39.80% neutral detergent fiber and 16.20% crude ...
Çelik H.A., Avci G., Aydin I., Bülbül A., Bülbül T.   +4 more
openaire   +5 more sources

New perspectives and evolution of ovulation synchronization protocols in bovine females. [PDF]

Anim Reprod
Sales JNS, Carvalho LR, Simões LMS, Lemos LA, Vicente MP, Silva RRR, Orlandi LO, Baruselli PS, de Souza JC.   +8 more
europepmc   +1 more source

Evaluating the Impact of Clinical Mastitis on Ovarian Morphometry and the Effectiveness of the Synchronisation Protocol in Dairy Cows. [PDF]

Animals (Basel)
Lembovičiūtė G, Šertvytytė G, Antanaitis R, Žilaitis V, Baumgartner W, Rutkauskas A.   +5 more
europepmc   +1 more source

Impacts of heat stress under oceanic climate on fertility and reproductive physiology of dairy cows subjected to hormonal synchronization. [PDF]

Int J Biometeorol
Martínez EN, Castillo C, Avendaño-Reyes L, Hernández J, Benedito JL, Rico A, Garcia P, Muiño R.   +7 more
europepmc   +1 more source

Economics of Using GnRH on Day 5 After Timed Artificial Insemination in a Modified Double-Ovsynch Protocol at a Low-Fertility Dairy Farm. [PDF]

Vet Sci
Borș SI, Ariton AM, Borș A, Hârbu AI, Vintilă V.   +4 more
europepmc   +1 more source