Results 11 to 20 of about 708 (172)

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

Reproductive Efficiency of Low-Fertility Dairy Cows Submitted to Presynch-Ovsynch or Double-Ovsynch Scheme for First Service. [PDF]

Animals (Basel)
Reproductive efficiency has a major impact on the profitability of dairy operations. Focusing on improving the reproductive performance of cows with expected reduced fertility is desired; however, further research is needed in this area. The objectives of this study were to identify a subpopulation of cows with suboptimal fertility and evaluate whether
Mendonça LGD, Wronka K, Fridkovski G, Bilby T, Stevenson J.   +4 more
europepmc   +4 more sources

Comparison of the Evaluation of Combination of Ultrasonography of the Reproductive Tract With Hormone Administration on Dairy Cow Fertility

Frontiers in Veterinary Science, 2022
Further optimization of reproduction management programs in dairy cows is a contemporary research topic. In this context, our study aimed to compare a hormone program, named “uterus-ovary monitoring and classified use of hormone program” (M+C), with the ...
Bingke Wang, Bingke Wang, Bingke Wang, Jinbang Xiao, Jinbang Xiao, Yongjie Ma, Yongjie Ma, Chuxi Gao, Chuxi Gao, Hanbing Li, Hanbing Li, Yonghong Jia, Yaping Jin, Yaping Jin, Pengfei Lin, Pengfei Lin   +15 more
doaj   +1 more source

PREVALENCE, DIAGNOSTICS AND TREATMENT OF OVARIAN FOLLICULAR CYSTS IN DAIRY COWS [PDF]

Trakia Journal of Sciences, 2019
Ovarian cysts are among the primary causes for poor reproduction efficiency and economic losses in dairy cattle farming. Material and metods: The studies were performed in 2015-2017 in three dairy cattle farms.In the experiment, 79 cows with follicular ...
G. Naglis
doaj   +1 more source

The effect of different FSH administration before ovum pick up on superstimulation response and oocyte yield

Reproduction in Domestic Animals, Volume 58, Issue 8, Page 1055-1062, August 2023., 2023
Abstract This study aims to evaluate the effect of synchronization and different superstimulation protocols on oocyte yield before ovum‐pick up (OPU) to provide a homogeneous follicle population. Animals in all study groups except the control group applied a synchronization protocol including modified ovsynch+progesterone and dominant follicle ablation
Muhammed Furkan Ciftci, Dursun Ali Dinc
wiley   +1 more source

Effects of daily propylene glycol drenching during the Ovsynch protocol on fertility and metabolic parameters in lactating dairy cows

Reproduction in Domestic Animals, Volume 58, Issue 8, Page 1097-1103, August 2023., 2023
Abstract Negative energy balance (NEB) caused by restricted feed intake leads to body condition loss (BCS), increased metabolic stress and reduced fertility in dairy cows. Propylene glycol (PG) is a precursor of ruminal propionate for gluconeogenesis used to increase metabolic adaptation to the early postpartum period.
Rabia Cakircali, Ebru Karakaya‐Bilen, Baris Guner, Zafer Mecitoglu, Cihan Tolga Ortac, Abdulkadir Keskin, Abdulkadir Orman, Ahmet Gümen   +7 more
wiley   +1 more source

Efecto en la eficiente reproductiva mediante el uso de dos protocolos (eCG y Ovsynch) para IATF en ganado bovino tropical

Revista de Veterinaria y Zootecnia Amazónica, 2023
La situación económica mundial requiere de prácticas de manejo eficaces para mejorar la rentabilidad de los establecimientos de producción de leche, especialmente, en ganadería de trópico. El objetivo es demostrar el efecto en la eficiencia reproductiva
Hugo Sánchez-Cárdenas, Pedro Vargas-Rodríguez   +1 more
doaj   +1 more source

Effects of fresh‐cow grouping strategy and rumen‐protected glucose on production performance, reproductive variables and risk of culling in Holstein cows

Veterinary Medicine and Science, Volume 9, Issue 3, Page 1338-1348, May 2023., 2023
We hypothesized that a faster transition (14 versus 21 days) from a fresh‐cow diet (higher forage:concentrate) to a lactation diet (lower forage:concentrate), combined by a greater glucose supply at the intestinal level during the fresh period will have a positive long‐term effect on productivity of high‐producing Holsteins.
H. Beiranvand, F. Ahmadi, S. Babajanzade‐Sorati, Ali A. Alamouti   +3 more
wiley   +1 more source

Application of gender‐ablated semen during timed artificial insemination following oestrous synchronization in dairy and beef cows

Reproduction in Domestic Animals, Volume 58, Issue 4, Page 529-536, April 2023., 2023
Abstract The objectives of this study were to compare oestrous synchronization expression and conception rate following timed artificial insemination (TAI) with frozen–thawed X‐sexed or unsexed semen in dairy and beef cows. For this study, 227 cows (dairy, n = 130 and beef, n = 97) were assigned to a 9‐day Ovsynch + controlled intravaginal drug release
Thabang Luther Magopa, Masindi Lottus Mphaphathi, Thendo Mulaudzi   +2 more
wiley   +1 more source

Effect of oestrus synchronisation through ovulation delay by vaccination against foot‐and‐mouth disease in Hanwoo (Bos taurus coreanae) cows

Veterinary Medicine and Science, Volume 9, Issue 2, Page 974-981, March 2023., 2023
The purpose of this study is to improve the fertility rate by ovulation delay caused by foot‐and‐mouth disease vaccination. We figure out that ovulation delay can be employed to improve conception rate after FMD vaccination through a modified ovulation synchronization method with 500 μg of GnRH administration.
Daehyun Kim, Woo‐Sung Kwon, Jaejung Ha, Jaejo Kim, Danil Kim, Wonyou Lee, Joonho Moon, Junkoo Yi   +7 more
wiley   +1 more source