Results 71 to 80 of about 3,996 (257)

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

Efficacy Of Different Protocols Of Ovulation Synchronization And Resynchronization In Argentinian Buffalo Herds [PDF]

, 2019
During the last years bufalo reproductive researchers have been tried to develop and apply fxed timed artifcial insemination protocols to increase pregnancy rates to maximize improvement.
Berdugo, Jesus Alfredo, Cardona Maya, Walter Darío, Crudeli, Gustavo Angel, de la Sota, Rodolfo Luzbel, Konrad, José Luis, Vallejos, Natalia, Yuponi, Roberto Gregorio   +6 more
core  

Foliküler Kistli Holstein Irkı Düvelerde Ovsynch Protokolünün Gebelik Oranları Üzerine Etkisi

Erciyes Üniversitesi Veteriner Fakültesi Dergisi, 2023
Bu çalışmada, foliküler kistli Holstein ırkı düvelerde Ovsynch programının tedavideki etkinliğini belirlemek amaçlan- dı. Özel bir süt sığırı işletmesinde, iki veya üç tohumlamadan sonra gebe kalmayan, sık düzensiz, uzun veya sürekli östrüs belirtileri gösteren 2018 yılında 19 baş, 2022 yılında 17 baş, toplam 36 baş Holstein ırkı düve on gün arayla ...
Şükrü DURSUN, Mehmet KÖSE, Sedat Hamdi KIZIL, Gaye BULUT, Caner ÖZTÜRK, Mehmet Osman ATLI, Tahir KARAŞAHİN   +6 more
openaire   +5 more sources

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

Efecto de la bST sobre la fertilidad de vacas lecheras de primer servicio sincronizadas por medio del protocolo Doublesynch [PDF]

, 2013
In this study, the pregnancy rate of Doublesynch and Presynch-Ovsynch synchronization protocols, using bovine somatotropin hormone (bST), was compared at artificial insemination (AI) time, using first service cows.
Gallmeier Jaramillo, Michelle Daniela
core  

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

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

Human chorionic gonadotropin and GnRH effects on pregnancy survival in pregnant cows and resynchronized pregnancy rates [PDF]

, 2007
Dairy Research, 2007 is known as Dairy Day, 2007Experiments have shown human chorionic gonadotropin (hCG) to be more effective than gondadotropin releasing hormone (GnRH) as a means to ovulate follicles.
Burns, M.G., Buttery, B.S., Stevenson, Jeffrey S.   +2 more
core   +2 more sources

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