Results 21 to 30 of about 2,055 (165)

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

EFFECT OF DOUBLE OR PRE-SYNCHRONIZATION OVSYNCH PROTOCOLS ON FOLLICULAR DYNAMICS, PROGESTERONE PROFILE AND FIRST SERVICE PREGNANCY RATE IN TIMED ARTIFICIAL INSEMINATION IN FRIESIAN COWS [PDF]

Journal of Animal and Poultry Production, 2015
Aim of this study was to determine the effect of double-Ovsynch (DO) and pre-synchronization (PS) protocols on ovarian follicular dynamics, progesterone (P4) concentration and pregnancy rate at first postpartum AI in Friesian cows.
M. Omar, M. El-Banna, M. El-Harairy
doaj   +1 more source

Ultrasonographic patterns of different regions of uterus according to pregnancy in cows and heifers

Animal Science Journal, Volume 94, Issue 1, January/December 2023., 2023
Abstract This study aimed to detect pregnancy within the first 20 days after artificial insemination by evaluating the ultrasonographic patterns of the different regions of uterus in Holstein heifers and cows. Animals were divided into subgroups according to pregnancy on 28th day as pregnant (heifer, n: 15; cow, n: 15) and non‐pregnant (heifer, n: 15 ...
Kemal Tuna Olğaç, Murat Onur Yazlik, Ufuk Kaya, Mehmet Borga Tirpan   +3 more
wiley   +1 more source

OvSynch-Verfahren bei optimal und unterkonditionierten Braunviehkühen [PDF]

, 2007
In vorliegender Studie wurde das Synchronisationsverfahren (OvSynch) unter schweizerischen Verhältnissen bei Braunviehkühen untersucht. Insbesondere ging es um die Abklärung, inwieweit die Körperkondition den Erfolg dieser Methode beeinflussen kann.
Koch, Christoph
core   +3 more sources

Effect of Dalmavital and Ovulik Plus on conception rate in Ovsynch synchronized Nili-Ravi buf- faloes

Revista Científica, 2023
Nili-Ravi buffalo are known as the “Black Gold of Pakistan”. It is the most prized dairy animal in Pakistan. Silent estrus and shy behavior are among the main causes of poor reproductive efficiency in buffalo, leading to prolonged calving intervals ...
Muhammad Tayyab Khan, Muhammad Muzammal Niaz , Ghulam Shabbir Khan   +2 more
doaj   +1 more source

Effect of Different Protocols of Fixed‐Time Artificial Insemination on Mucus, Ovarian Size, and Pregnancy of Mixed‐Breed Cows in the Humid Tropics of Peru

Veterinary Medicine International, Volume 2023, Issue 1, 2023., 2023
The objective of the research was to evaluate three synchronization protocols for fixed‐time artificial insemination (FTAI) in Bos indicus with Bos taurus crossbred cows. Forty‐five cows of 5 ± 1.6 years were selected. The Jsynch treatment consisted of the application of an intravaginal device plus benzoate; on day 8, the device was removed and PGF2α ...
Clavel Diaz-Quevedo, Alonso Ramírez García, Lenin Torres Bernal, Jorge Cáceres Coral, Gustavo Ampuero Trigoso, José Américo Saucedo-Uriarte, Sumanta Nandi   +6 more
wiley   +1 more source

Comparison of the initial ovarian response, the synchrony of oestrus and ovulation and chronic stress response after administration of 100 or 250 μg of GnRH to randomly cycling Bos indicus cattle

Australian Veterinary Journal, Volume 100, Issue 10, Page 479-491, October 2022., 2022
Objective This study investigated the effects of administering saline, 100 or 250 μg of gonadotrophin releasing hormone (GnRH) on ovarian response, synchrony of oestrus and ovulation and chronic stress response in Bos indicus cattle. Design Randomised control.
M Abdallah, C Joone, S Edwards, S Das, J Cavalieri   +4 more
wiley   +1 more source

Effect of progestagen application during ovsynch protocol on pregnancy rates of lactating-grazing cows [PDF]

Kafkas Universitesi Veteriner Fakültesi Dergisi, 2017
The aim of this study was to test the effect of progesterone supplementation to Ovsynch protocol in lactating and grazing cows on pregnancy rate after fixed time artificial insemination (TAI).
ARI UÇ, PANCARCI ŞM, KAÇAR C, GÜNGÖR Ö, LEHİMCİOĞLU NC, ÖZTÜRKLER Y, YILDIZ S   +6 more
doaj   +1 more source