Results 51 to 60 of about 708 (172)

Heat Synchronization Protocols in Dairy Cattle (Bos indicus) and Success Factors in Niger

Veterinary Medicine International, Volume 2026, Issue 1, 2026.
Synchronization and induction of ovulation enable the control and harmonization of femaleestrus cycle facilitating artificial insemination (AI) by mitigating the challenges associated with heat detection. In Niger, progestogens alone or in combination with other hormones such asgonadotropin‐releasing hormone (GnRH) and prostaglandin F2alpha (PGF2α ...
Mahamadou Moussa Garba, Mani Mamman, Hamadou Issa, Lipi Buch   +3 more
wiley   +1 more source

Comparison of responses to Ovsynch between Holstein-Friesian and Swedish Red cows [PDF]

Journal of Dairy Science, 2011
The Ovsynch protocol was designed to synchronize ovulation, thereby allowing timed artificial insemination (TAI) of all cows without detection of estrus. However, the effectiveness of Ovsynch in different breeds of dairy cows has not been previously compared.
Keskin, A., Yilmazbas-Mecitoglu, G., Gumen, A., Karakaya, E., Celik, Y., Okut, H., Wiltbank, M. C.   +6 more
openaire   +5 more sources

Extracellular Vesicles Derived From Antral Follicles Significantly Change the Transcriptional Profile of Cumulus Cells and Oocytes During Pre‐In Vitro Maturation in Cattle

Molecular Reproduction and Development, Volume 92, Issue 11, November 2025.
ABSTRACT Cumulus‐oocyte complexes (COCs) used for in vitro production (IVP) of bovine embryos originate from antral follicles of different sizes, leading to variations in developmental competence. To address this, pre‐in vitro maturation (pre‐IVM) allows oocytes with additional time to acquire developmental competence.
Gisele Zoccal Mingoti, Giovana Barros Nunes, Mirela Brochado Souza‐Cáceres, Cintia Rodrigues da Silva, Ricardo Perecin Nociti, Flávia Florêncio de Athayde, Henry David Mogollón‐García, Natália Marins Bastos, Paola Maria Silva Rosa, Lindomar de Oliveira Alves, Sérgio Antonio Garcia Pereira‐Júnior, Fernanda Fagali Franchi, João Carlos Pinheiro Ferreira, Juliano Coelho da Silveira, Marcos Roberto Chiaratti   +14 more
wiley   +1 more source

Subclinical Ketosis: Reproductive Performance and Milk Yield in Dairy Cows Receiving Oral Glucogenic Precursors During Early Postpartum Period

Veterinary Medicine and Science, Volume 11, Issue 5, September 2025.
This study evaluated the effects of postpartum subclinical ketosis on milk yield and reproductive performance in dairy cows. Subclinical ketosis did not adversely affect milk yield or pregnancy rates in cows inseminated after estrus detection and a fixed‐time insemination protocol.
Baris Guner, Aslihan Ayalp Erkan, Buse Ozturk, Olcay Sarikaya, Omer Kaan Tekin, Erkamgediz Tosun, Hidir Gencoglu   +6 more
wiley   +1 more source

Gestación en vacas lecheras con dos protocolos de sincronización de la ovulación e inseminación a tiempo fijo

Revista Mexicana de Ciencias Pecuarias, 2015
Se comparó la tasa de gestación (TG) en vacas lecheras inseminadas a tiempo fijo mediante dos protocolos. El día 32 posparto, 275 vacas recibieron dos inyecciones de PGF2α con intervalo de 14 días.
Silvano Flores Domínguez, Luis Ramón Muñoz Flores, Reyes López Ordaz, Carlos Fernando Aréchiga Flores, Gabriela Mapes, Joel Hernández Cerón   +5 more
doaj   +3 more sources

Evaluation of the Accuracy and Performance of Two Commercial Pregnancy‐Associated Glycoprotein Tests for Early Pregnancy Detection in Cows

Veterinary Medicine and Science, Volume 11, Issue 2, March 2025.
Early pregnancy diagnosis contributes to increasing productivity and profitability in dairy farms. The performance of AOPT and AMPT used for early pregnancy diagnosis in dairy cattle was evaluated for the first time together. AOPT and AMPT are practical methods for early pregnancy diagnosis, 28 days after insemination in dairy cows. ABSTRACT The aim of
Tarik Safak, Kenan Çağrı Tümer, Yağmur İpek Alp, Taha Yasin Özen, Oznur Yilmaz‐Koc   +4 more
wiley   +1 more source

Estrus Induction and Fertility Response following Ovsynch Alone and Ovsynch plus PRID Protocol in Postpartum Anestrus Surti buffaloes

THE INDIAN JOURNAL OF VETERINARY SCIENCES AND BIOTECHNOLOGY, 2017
The study was undertaken to find out the estrus induction and conception rate in 18 postpartum anestrus Surti buffaloes divided equally into three groups and treated with Ovsynch protocol alone and in combination with PRID, keeping one group as control.
C. T. Khasatiya, H. R. Savani, Swati Saxena, M. D. Patel   +3 more
openaire   +1 more source

Repeat Breeder Syndrome Therapies in Dairy Cows: A Review

Reproduction in Domestic Animals, Volume 59, Issue 10, October 2024.
ABSTRACT Repeat breeder (RB) cows are clinically healthy animals with regular oestrous cycles that do not become pregnant after three or more services. This syndrome has an incidence ranging between 10.1% and 24%. Repeat breeder syndrome (RBS) in dairy cows leads to economic losses to dairy farmers by increasing the calving interval and consequently ...
Alice Carbonari, Matteo Burgio, Lorenza Frattina, Vincenzo Cicirelli, Annalisa Rizzo   +4 more
wiley   +1 more source

Early prognostic markers to predict unsuccessful pregnancy in dairy cattle

Reproduction in Domestic Animals, Volume 59, Issue 5, May 2024.
Abstract This study aimed to investigate maternal serum levels of some angiogenic factors and certain proteins in dairy cattle for (1) early prediction of unsuccessful fertilization and (2) early detection of possible pregnancy failures (early EM) after positive insemination Serum samples were collected from the same cattle at three distinct time ...
Beran Yokus, Abdurrahman Takci, Nazli Ercan, Bernan Em, Ersin Uysal   +4 more
wiley   +1 more source

Determination of expression patterns of miR‐26a, and preimplantation factor levels for early pregnancy detection in nulliparous and multiparous cows

Reproduction in Domestic Animals, Volume 59, Issue 1, January 2024.
Abstract For maximum productivity in a dairy farm, the earliest and the most accurate detection of pregnancy is essential. The aim of this study was to determine the efficacy of expression patterns of miR‐26a, and serum Preimplantation Factor (PIF) levels for pregnancy diagnosis during the early pregnancy in nulliparous and multiparous cows. A total of
Kemal Tuna Olğaç, Murat Onur Yazlik, Hüseyin Özkan, Ufuk Kaya, Mehmet Borga Tirpan   +4 more
wiley   +1 more source