Results 11 to 20 of about 3,996 (257)

Benefits of using Double-Ovsynch versus presynch-ovsynch are affected by environmental heat in primiparous holstein lactating cows

Animal Reproduction Science, 2023
Optimized reproduction management enhances fertility of dairy cows, and thus improves their milk production efficiency. Comparing different synchronization protocols under variable ambient conditions would be conducive to protocol selection and production efficiency improvement.
Huazhao, Li, Nan, Sun, Yao, Xiao, Hongzhen, Yang, Zhigang, Guo, Yuxin, Lin, Xiaojie, Wang, Qipeng, Wu, Yang, Zhou, Liguo, Yang, Guohua, Hua   +10 more
openaire   +3 more sources

Effect of Double-Ovsynch and Presynch-Ovsynch on postpartum ovarian cysts and inactive ovary in high-yielding dairy cows. [PDF]

Front Vet Sci
IntroductionOptimizing the management of dairy cattle reproduction can reduce postpartum ovarian disease in high-yielding dairy cows and thus enhance ranch economic benefit. The hypothesis of this study was that the Double-Ovsynch (DO) protocol in high-producing dairy cows would result in a lower incidence of follicular cysts but a higher incidence of ...
Li Z, Luan S, Yan L, Xie C, Lian Z, Yang M, Mei M, Lin P, Wang A, Jin Y.   +9 more
europepmc   +4 more sources

Ovsynch versus Ultrasynch

American Association of Bovine Practitioners Conference Proceedings, 2009
The steady decrease in reproductive efficiency of dairy cattle and increase in use of synchronization protocols have generated interest in development of a synchronization program that improves pregnancy rate while decreasing the number of hormone treatments.
McArt, J. A. A., Caixeta, L., Machado, V., Guard, C. L., Bicalho, R. C.   +4 more
openaire   +3 more sources

Estrus Synchronization and Pregnancy Rate Using Ovsynch Method in Uganda Dairy Farms

Journal of Animal Reproduction and Biotechnology, 2017
The artificial insemination (AI) is one of the best assisted reproductive technologies for increasing reproductive capacity and facilitating the genetic improvement in farm animals.
Dae-Jin Kwon, Seok Ki Im, Hyun Kim, Hak-Kyo Lee, Ki-Duk Song   +4 more
doaj   +2 more sources

Delaying Injection of prostaglandin F2α in an Ovsynch protocol

Kansas Agricultural Experiment Station Research Reports, 2006
Our objective was to determine whether delaying the PGF2α injection by 24 or 48 hr after the first GnRH injection in an Ovsynch protocol (from a standard 7 days) altered ovarian characteristics in lactating dairy cows. Estrous cycles were synchronized in 36 Holsteins after removal of a progesteronereleasing controlled internal drug release (CIDR ...
M.A. Portaluppi, D.E. Tenhouse, Jeffrey S. Stevenson   +2 more
openaire   +3 more sources

A Comparative Analysis of Double-Ovsynch and Ovsynch-Heat-Synch Protocols on Pregnancy Rates in Primiparous Dairy Cows [PDF]

Veterinary and Comparative Biomedical Research
Today, ovulation synchronization methods are widely used to improve fertility in dairy cows. In this regard, this research was conducted in one of the dairy herds in East Azerbaijan province, Iran. The cows were randomly divided into two groups.
Reza Ghasemian Moghadam, Afshin Davasaz Tabrizi, Arian Narouiee, Omid Mohammadpour   +3 more
doaj   +2 more sources

İnek ve düvelerde luteal aktivitenin ovsynch protokolüne etkisi

, 2007
To compare the effect of ovsynch protocol beginning in luteal or follicular phases on pregnancy rates in cows and heifers, a total of 22 cows and 58 heifers were allocated into two groups according to their serum progesterone levels at the beginning of the ovsynch protocol. All animals were synchronized with i.m. injection of 50 µg lesirelin acetate on
KIRBAS, Mesut, ÇOYAN, Kenan, BÜLBÜL, Bülent, ATAMAN, Mehmet Bozkurt, KÖSE, Mehmet, AKMAN, Orhan, DURSUN, Şükrü   +6 more
openaire   +4 more sources

Ovsynch Breeding Program for Dairy Cows

The Bovine Practitioner, 2001
Heat detection is the single biggest impediment to improved reproductive performance in many dairy herds. Recently, a program for synchronization of ovulation ("Ovsynch") has been developed, which allows for breeding by scheduled artificial insemination.
S.J. LeBlanc
openaire   +3 more sources

Presynchronization using a modified Ovsynch protocol or a single gonadotropin-releasing hormone injection 7 d before an Ovsynch-56 protocol for submission of lactating dairy cows to first timed artificial insemination [PDF]

Journal of Dairy Science, 2014
Paulo Jose David Carvalho, Milo Charles Wiltbank   +1 more
exaly   +2 more sources

Fertility of Crossbred Dairy Cattle After Progesterone-Supplemented Co-Synch in Southwestern Ethiopia. [PDF]

Vet Med Int
In Ethiopia, the reproductive efficiency of dairy cattle utilizing artificial insemination (AI) is low, and implementing estrus and ovulation synchronization protocols could enhance the efficiency. Therefore, this study was designed to evaluate the effect of progesterone (P4) supplementation during Co‐Synch on estrus response (ER) and pregnancy per AI (
Dodicho AA, Gebeyehu ST, Kidane ZY.
europepmc   +2 more sources