Results 61 to 70 of about 708 (172)

Comparative Study of Pregnancy Rate of Dairy Cows Inseminated with Fresh or Frozen-Thawed Semen

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2020
The aim of this study was to investigate conception rates (CR) achieved with artificial insemination of Holstein cows using fresh or frozen insemination doses (ID). The synchronization protocols (Double-Ovsynch, Ovsynch, ReSynch) and pedometers were used
Jan Pytlík, Luděk Stádník, Jaromír Ducháček, Radim Codl   +3 more
doaj   +1 more source

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   +2 more sources

Treatment of Cycling and Noncycling Lactating Dairy Cows with Progesterone During Ovsynch [PDF]

Journal of Dairy Science, 2006
Our objective was to determine whether progesterone (P4) supplementation during an Ovsynch protocol would enhance fertility in lactating dairy cows. Lactating dairy cows (n = 634) at 6 locations were assigned randomly within lactation number and stage of lactation to receive the Ovsynch protocol [OVS; synchronization of ovulation by injecting GnRH 7 d ...
J S, Stevenson, J R, Pursley, H A, Garverick, P M, Fricke, D J, Kesler, J S, Ottobre, M C, Wiltbank   +6 more
openaire   +2 more sources

Pregnancy rates in hair sheep after Ovsynch synchronization and a combined intracervical fixed-time artificial insemination and 10-day mating period [PDF]

Veterinary World, 2019
Aim: This study aimed to evaluate the pregnancy rates in hair ewes using an Ovsynch synchronization protocol under a breeding system that combines fixed-time insemination plus a 10-day mating period as an alternative. Materials and Methods: Through an
D. A. Vallejo, J. D. Londoño, Y. A. Yepes, V. Tamayo, A. F. Mejia, J. G. Maldonado   +5 more
doaj   +1 more source

Uso del protocolo Ovsynch en el control del anestro postparto en vacas mestizas de doble propósito

Revista Científica, 2010
Para evaluar el efecto del protocolo Ovsynch sobre parámetros de fertilidad en vacas mestizas doble propósito en anestro y definir el momento óptimo para la IA a tiempo fijo (IATF), 37 de 48 vacas acíclicas se asignaron a los siguientes grupos: T1 ...
Juan Carlos Gutiérrez Añez, Roberto Palomares Naveda, Jorge Sandoval Martínez, Aitor De Ondíz Sánchez, Germán Portillo Martínez, Eleazar Soto Belloso   +5 more
doaj  

Stimulating Reproductive Functions at Acyclic Cows by Ovsynch and Select Synch Protocols

Scientific Papers Animal Science and Biotechnologies, 2023
The purpose of our work was to compare the efficiency of two programs for the induction and synchronization of estrous and ovulation in acyclic cows (Ovsynch and Select Synch).
Ion Carabă, Nicolae Păcală, Marioara Nicula, Dorel Dronca, Silvia Erina   +4 more
doaj  

Retardo da realização da IATF sobre o desempenho reprodutivo na estação de acasalamento de vacas de corte lactantes

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2012
Compararam-se efeitos de diferentes protocolos para a IATF com o acasalamento natural (Controle) sobre o desempenho reprodutivo de 249 vacas Aberdeen Angus, distribuídas em cinco grupos: Controle (n=50); Crestar 2º uso (n=64); OvSynch (n=65); Primer ...
C. Gottschall, H.R. Bittencourt, R.C. Mattos, R.M. Gregory   +3 more
doaj   +1 more source

ANGKA KEBUNTINGAN SAPI LOKAL SETELAH DIINDUKSI DENGAN PROTOKOL OVSYNCH (Conception Rates of Local Cows after Induction with Ovsynch Protocols)

Jurnal Medika Veterinaria, 2015
This study aims to know the effect of estrus synchronization using ovsynch method on local cow pregnancy rate. This study used 10 local cows without pregnant status and clinically healthy. All cows were divided into 2 treatment groups. Cows in group I (K1) were synchronized estrus using 5 mg/ml PgF2α intramuscularly with multiple injection patterns ...
Mefrianti Efendi, Tongku Nizwan Siregar, Hamdan Hamdan, Dasrul Dasrul, Cut Nila Thasmi, Razali Razali, Arman Sayuti, Budianto Panjaitan   +7 more
openaire   +1 more source

Impact of three different ovulation synchronization protocols on first-service conception rates in postpartum cows [PDF]

Iraqi Journal of Veterinary Sciences
The study was conducted on 60 Holstein dairy cows during 50 and 60 days postpartum in different rural areas in Al-Anbar Province, Iraq. This study evaluated the effects of two ovulation synchronization protocols on postpartum fertility performance ...
Ahmed I. Alsuwaidawi, Hani M. Alrawi
doaj   +1 more source

Pregnancy outcome of lactating dairy cows assigned for Presynch-Ovsynch synchronization program and inseminated either at detected standing heat or at scheduled fixed time

Asian Pacific Journal of Reproduction, 2019
Objective: To determine if insemination at standing heat results in a similar or higher pregnancy rate compared with fixed time artificial insemination, and to study some factors affecting the pregnancy rate.
Abdel-Tawab Abdel-Razek Yassyn Khalil, Mahmoud Mohamed Hussein   +1 more
doaj   +1 more source