Results 61 to 70 of about 105 (71)

Effect of 14/11 Presynch/Ovsynch on First Service Conception Rates of Lactating Dairy Cows Compared to AI following a Detected Estrus

American Association of Bovine Practitioners Conference Proceedings, 2010
Fertility of lactating dairy cows has declined during the past 40 years yet fertility of heifers has remained constant. Lactating dairy cows have larger follicles and corpora lutea compared to heifers yet significantly less estrogen and progesterone concentrations in circulation.
Strickland, Jaimie, Neuder, Lou, Jimenez-Krassel, Fermin, Martins, Joao Paulo, Pursley, J. Richard   +4 more
openaire   +1 more source

ANÁLISE DA EFICIÊNCIA REPRODUTIVA DOS PROTOCOLOS HORMONAIS PRESYNCH E OVSYNCH EM VACAS HOLANDESAS

Scientia Generalis
Reproductive efficiency depends on reducing the calving interval through artificial insemination or natural breeding, leading to a higher conception rate in a shorter time. The Presynch and Ovsynch insemination protocols are the most commonly used.
Fernando Miller Sousa Rodrigues, Victor Jordão Pimentel Nunes, Paulo Rufino Paulino Vieira   +2 more
openaire   +1 more source

Using prostaglandin F2α and gonadotropin-releasing hormone simultaneously 7 d prior to Ovsynch increased first-service pregnancies per artificial insemination compared to Presynch-14/Ovsynch

American Association of Bovine Practitioners Conference Proceedings, 2018
Fertility programs such as G6G and Double-Ovsynch improve reproductive performance in lactating dairy cows following first service compared to cows inseminated following estrus. However, implementation of these programs in dairy operations can be logistically challenging due to hormone treatments on 4 different days of the week, which increase labor ...
Martins, J. P. N., Martinez, W., Schmitt, J. S., Ross, P. J.   +3 more
openaire   +1 more source

بررسی تأثیر برنامه Presynch-Ovsynch بر روی کارایی تولیدمثلی گاوهای شیری مبتلا به جفت ماندگی

2013
زمینه مطالعه: جفت ماندگی کارایی تولید مثلی گاوهای شیری را کاهش می‌دهد. هدف: هدف از انجام این مطالعه بررسی تأثیر برنامه همزمانی فحلی ‌Presynch Ovsynch‌، بر کارایی تولیدمثلی گاوهای مبتلا به جفت ماندگی در یک دامپروری گاو شیری در ایران بود. روش ‌کار: ‌این مطالعه بر روی 244 رأCس گاو شیری هلشتاین در یک گاوداری صنعتی در تهران انجام گرفت.
openaire   +1 more source

Effects of the Double-Ovsynch and Presynch–Ovsynch protocols on first-service conception rate in dairy cows with and without subclinical endometritis

Tropical Animal Health and Production
Fernando Villaseñor-González, Dan Ponce-Aguilar, Héctor Raymundo Vera-Ávila, Felipe de Jesús Ruiz-López, Mario A. Espinosa-Martínez, Marina Durán-Aguilar, Luis J. Montiel-Olguín   +6 more
openaire   +2 more sources

Comparison of the effects of Presynch-Ovsynch, Presynch- Ovsynch+CIDR, and G6G protocols on the reproductive performance of lactating Holstein cows in the postpartum period

Veterinarska Stanica, 2022
Hesam Kohsari
exaly  

Pregnancy per artificial insemination after presynchronizing estrous cycles with the Presynch-10 protocol or prostaglandin F2α injection followed by gonadotropin-releasing hormone before Ovsynch-56 in 4 dairy herds of lactating dairy cows

Journal of Dairy Science, 2012
S L Pulley, S L Pulley, J S Stevenson
exaly  

Results of a PreSynch OvSynch Protocol in Nine Ragusa Dairy Herds

2003
J. D. FERGUSON, D. T. GALLIGAN, J. W. BROOKS, G. AZZARO, S. VILLARI, S. VENTURA, LICITRA, Giuseppe   +6 more
openaire   +1 more source

1270 Profitability of dairy cows managed for first service with the Double-Ovsynch or Presynch-Ovsynch protocol and different duration of the voluntary waiting period

Journal of Animal Science, 2016
M. L. Stangaferro, R. Wijma, M. Masello, G. E. Granados, J. O. Giordano   +4 more
openaire   +1 more source

1257 Reproductive performance of lactating dairy cows managed for first service with the Double-Ovsynch or Presynch-Ovsynch protocol and different duration of the voluntary waiting period

Journal of Animal Science, 2016
M. L. Stangaferro, R. Wijma, M. Masello, J. O. Giordano   +3 more
openaire   +1 more source