Results 21 to 30 of about 1,561,107 (243)

Fixed-time artificial insemination in beef cattle [PDF]

Acta Veterinaria Scandinavica, 2009
The study was designed to test the effect of fixed-time artificial insemination (fixed-AI) after the slightly modified Ovsynch protocol on the pregnancy rate in beef cattle in Finnish field conditions. The modification was aimed to optimize the number of offsprings per AI dose.Ninety Charolais cows and heifers were entered into the program an average ...
openaire   +3 more sources

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

Economics of timed artificial insemination with unsorted or sexed semen in a high-producing, pasture-based dairy production system

Journal of Dairy Science, 2022
: This study used a stochastic simulation model to estimate the potential economic benefit of using timed artificial insemination (TAI) in combination with conventional unsorted (TCONV) and sexed (TSEX) semen in heifers only (TCONV-H, TSEX-H) and in both
D.P. Walsh, A.G. Fahey, P. Lonergan, M. Wallace   +3 more
doaj   +1 more source

Delayed Insemination of Non-Estrual Beef Heifers in 7-day CO-Synch Timed Artificial Insemination [PDF]

, 2016
Reproductive performance in cattle is considered to be the most economically important trait and is essential for the success of an operation. In the last decade, timed artificial insemination (AI) in the beef cattle industry has increased in popularity ...
K. E. Fike, David Grieger, Shaw, D. C., D. C. Shaw, Fike, K. E., Grieger, David   +5 more
core   +1 more source

Timed Artificial Insemination: Pregnancy Rates in Sokoto Gudali Cattle Treated with Prostaglandin F2 Alpha at a Private Dairy Farm in Nigeria.

Animal Production: Indonesian Journal of Animal Production, 2018
Pregnancy rates (PR) resulting from timed artificial insemination (TAI) with frozen semen were investigated in 192 Sokoto Gudali (SG) cattle following estrus synchronization under 11- and 12- day treatment intervals with prostaglandin F2 alpha (Estrumate®
Olufisayo Oluwadamilare Leigh, Lukman Mustapha, Agbugba Chinyere Linda, Adaeze Ezenwanyi Ibiam   +3 more
doaj   +1 more source

Effect of dose and frequency of prostaglandin F2α treatments during a 7-day Ovsynch protocol with an intravaginal progesterone releasing device on luteal regression and pregnancy outcomes in lactating Holstein cows

Journal of Dairy Science, 2023
: Our objective was to evaluate the effect of 3 different Ovsynch protocols on progesterone (P4) and pregnancies per artificial insemination (P/AI), where all cows received a P4 releasing intravaginal device (PRID) from d 0 until d 8.
M. Hölper, L. Bretzinger, F. Randi, W. Heuwieser, S. Borchardt   +4 more
doaj   +1 more source

The Why’s, What’s, and How’s of Timed Artificial Insemination Programs [PDF]

, 2015
This report summarizes the benefits of using timed artificial insemination (AI) programs in lactating dairy cows. Since its beginnings, use of Ovsynch has penetrated the dairy industry and is most prevalent in the Midwest and Northeast regions of the U.S.
L. Mendonca, Stevenson, J., J. Stevenson, Mendonca, L.   +3 more
core   +1 more source

Effect of follicular growth promoters on timed artificial insemination in dairy cows.

Revista Mvz Cordoba, 2020
Objective. To evaluate the efficiency of equine chorionic gonadotropin (eCG) and follicle stimulating hormone (FSH) on the pregnancy rate of crossbred cows from different body condition score (BCS) in the postpartum period in timed artificial ...
Ítalo Câmara-de-Almeida, Fabrício Albani-Oliveira, Ana P Madureira, Graziela Barioni, Ciro A Alves-Torres   +4 more
doaj   +1 more source

Insemination factors affecting the conception rate in seasonal calving Holstein-Friesian cows [PDF]

, 2003
peer-reviewedDifferences in conception rate to first service between artificial inseminations (AI) carried out by commercial AI operators (CAI) or do-it-yourself operators (DIY), between natural service (NAT) and AI, between different AI sires, and ...
Mee, John F, Dillon, Pat, Mee, John, Evans, R. D., Donagh Berry, Kathleen O'Sullivan, O'Sullivan, Kathleen, Pat Dillon, Ross Evans, John Mee, Buckley, Frank, Frank Buckley, Berry, Donagh, Evans, Ross   +13 more
core   +1 more source

Management of Reproduction in Dairy Herds with Natural Service or Timed Artificial Insemination

EDIS, 2011
Both natural service and artificial insemination programs can work for managing reproduction on dairy farms. This 3-page fact sheet provides comparison of reproductive performance and economic considerations. Written by Fábio S.
Fábio S. Lima, Albert De Vries, Carlos A. Risco, José E. P. Santos   +3 more
doaj   +5 more sources