Results 41 to 50 of about 651 (133)

Timed artificial insemination protocols in dairy cattle: Functioning, shortcomings, and improvements

Czech Journal of Animal Science, 2023
Oestrus detection is currently at the top of the factors limiting the success of artificial insemination in dairy herds. This limitation becomes more pronounced as milk production increases because of higher metabolic clearance rates of steroid hormones ...
Amine Boudaoud
doaj   +1 more source

Estrus response and fertility rate in Kundhi buffaloes following estrus synchronization in breeding season

Journal of Advanced Veterinary and Animal Research, 2015
The aim of the present study was to compare the effect of two estrus synchronization treatments i.e., Ovsynch alone and Ovsynch plus Controlled Internal Drug Release (CIDR), on the occurrence of estrus and conception rate in Kundhi buffalo during ...
Qudratullah Kalwar, Akeel Ahmed Memon, Muhammad Bachal Bhutto, Hamzo Khan Kunbhar, Amjad Hussain Mirani, Muhammad Anwar Anwar, Shakeel Ahmed wagan   +6 more
doaj   +1 more source

The Impact of Feeding Organic Trace Minerals Using Advanced Chelate Technology on Reproductive Efficiency and Blood Parameters in Ghezel Ewes

Veterinary Medicine and Science, Volume 12, Issue 2, March 2026.
Supplementing the flushing diet with organic trace minerals based on advanced chelate technology enhanced the reproductive performance of ewes as compared with inorganic trace minerals. ABSTRACT Background The bioavailability of trace minerals (TM) in a diet is important for improving reproductive performance and fertility parameters.
Sedigheh Vatankhah, Marziyeh Ebrahimi, Gholamali Moghaddam, Davoud Kianifard, Akbar Taghizadeh, Reza Asadpour, Mohammad Hassan Nazaran   +6 more
wiley   +1 more source

A Comparative Analysis of Double-Ovsynch and Ovsynch-Heat-Synch Protocols on Pregnancy Rates in Primiparous Dairy Cows [PDF]

Veterinary and Comparative Biomedical Research
Today, ovulation synchronization methods are widely used to improve fertility in dairy cows. In this regard, this research was conducted in one of the dairy herds in East Azerbaijan province, Iran. The cows were randomly divided into two groups.
Reza Ghasemian Moghadam, Afshin Davasaz Tabrizi, Arian Narouiee, Omid Mohammadpour   +3 more
doaj   +1 more source

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

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

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