Results 31 to 40 of about 1,054 (154)

Control of Estrus in Sheep: Protocol Architectures, Seasonal Effects, and Breed-Specific Reproductive Performance

Animals
Sheep play a crucial role in strengthening food security in different regions, where climates are often variable and resources can be limited. The importance of these animals includes nutrition and income. For sustainable production, manipulating estrous
Amar Akermi, Atika Ouled Ali, Mounir Adnane, Aspinas Chapwanya   +3 more
doaj   +1 more source

Microvascularization of corpus luteum of bovine treated with equine chorionic gonadotropin

Microscopy Research and Technique, 2015
ABSTRACTThis study aimed to evaluate the morphological changes in microvascular density and corpus luteum (CL) vascularization in cows treated with eCG during stimulatory and superovulatory protocols. Sixteen cows were synchronized and divided into three groups: control (n = 6), stimulated (n = 4) and superovulated (n =6), one was submitted to estrous ...
Moura, Carlos Eduardo Bezerra, Rigoglio, Nathia Nathaly, Braz, Janine Karla França da Silva, Machado, Marcello, Baruselli, Pietro S., Papa, Paula de Carvalho   +5 more
openaire   +2 more sources

Nutritional Level and Type of Feed on the Reproductive Performance of Ewe and Its Effects on Offspring

Reproduction in Domestic Animals, Volume 61, Issue 8, August 2026.
ABSTRACT The amount and source of nutrition are important factors that influence an ewe's reproductive ability, but the effects of diet on the reproductive performance of its offspring are unclear. This study aimed to investigate the impact of maternal nutrition (level of nutrition and source) on the reproductive performance of ewes and their female ...
Fernanda Ferreira dos Santos, Maria Fernanda Soares Queiroz, Mônica Márcia da Silva, Amanda de Carvalho, Luciano Brochine, Mariluce Cardoso Oliveira, Sarita Bonagurio Gallo   +6 more
wiley   +1 more source

Comparative Investigation of GnRH‐Immunocastration and a Phytogenic Feed Additive on Reproductive Parameters, Testicular Echogenicity and Behavioural Activity in Young Holstein Bulls

Reproduction in Domestic Animals, Volume 61, Issue 8, August 2026.
ABSTRACT Managing aggressive behaviour in bulls often involves a trade‐off between handling ease and the anabolic benefits associated with endogenous testosterone production. This study compared the effects of GnRH‐immunocastration and a phytogenic feed additive on reproductive parameters, testicular echotexture and behavioural activity in young ...
Nurdan Coşkun, Oğuz Kaan Yalçin, Murat Yüksel, Cafer Tayyar Ateş, Hasan Basri Dingil, Fikret Karaca   +5 more
wiley   +1 more source

Factors associated with the reproductive performance of ewes inseminated laparoscopically in England and Wales: A longitudinal study

Veterinary Record, Volume 199, Issue 1, Page e21-e29, 4/11 July 2026.
Abstract Background Laparoscopic intrauterine artificial insemination (Lap‐AI) is used in sheep genetic improvement programmes. However, the lambing rate (LR) (i.e., the proportion of inseminated ewes that lamb) following Lap‐AI is variable. Previously, one small UK study investigated factors associated with LR, but it did not adjust for dependencies ...
Mike J. Glover, Laura E. Green, Rachel Clifton   +2 more
wiley   +1 more source

Paternal Caffeine Exposure Programs Offspring Stress Vulnerability via Sperm Dlk1‐Dio3 Imprinting‐Directed Remodeling of a Novel Neural Circuit

Advanced Science, Volume 13, Issue 40, 17 July 2026.
The study elucidates that paternal preconception stress can drive offspring hyperresponsivity of the stress system via hypomethylation of a specific DNA region in sperm. This key link is confirmed in a cohort of prospective fathers: the epigenetic alteration is associated with elevated stress hormone levels.
Mengxi Lu, Gaole Dai, Sen Zhu, Shuai Zhang, Tingting Wang, Yuan Meng, Fang Yang, Xiaoyi Han, Hui Wang, Hao Kou, Dan Xu   +10 more
wiley   +1 more source

Coding and Noncoding Uterine Small Extracellular Vesicle Content Differs in the Early Stages of Pregnancies Produced by Artificial Insemination and In Vitro Fertilization in Cattle

Molecular Reproduction and Development, Volume 93, Issue 7, July 2026.
ABSTRACT Establishing a successful pregnancy relies on effective communication between the mother and fetus. Small extracellular vesicles (sEVs) are pivotal in facilitating intercellular communication, transferring messenger RNA (mRNA), noncoding RNA (ncRNA), and proteins. Considering the prevalence of in vitro fertilization (IVF) in bovine production,
Amanda de Oliveira Furlan, Alessandra Bridi, Jéssica Nora Drum, Liza Margareth Medeiros de Carvalho Sousa, Mariana Cordeiro Almeida, Juliana de Souza Felix, Luana Araujo Zutin, Isabelle Alexandrino dos Santos, Flávia Regina Florencio de Athayde, Natália Francisco Scaramele, Camila Azzolin de Souza, Paula de Carvalho Papa Keohane, Juliano Coelho da Silveira, Roberto Sartori Filho, Danila Barreiro Campos, Flavia Lombardi Lopes   +15 more
wiley   +1 more source

Polymorphism of the Gonadotropin‐Releasing Hormone Receptor Gene and Its Association With Production Traits in Isfahani Native Hens

Veterinary Medicine and Science, Volume 12, Issue 4, July 2026.
This research was conducted to identify genetic polymorphisms of the GNRHR gene on Isfahan native hen traits and their relationship with production traits. For this purpose, blood was taken, DNA was extracted, the target fragment was amplified and directly sequenced, and finally it was blasted with the reference gene in NCBI.
Farshid Kheiri, Mostafa Faghani, Mohammad Mohammadi Berenjegani, Somayeh Tirbakhsh Gouran, Matin Rahimi Domakani   +4 more
wiley   +1 more source

Comparative Effects of Laparotomy and Laparoscopy‐Assisted Embryo Transfer on Oxidative Stress and Thiol–Disulphide Homeostasis in Tuj Ewes

Veterinary Medicine and Science, Volume 12, Issue 4, July 2026.
Laparoscopic embryo transfer in Tuj ewes induces less oxidative stress and better preserves thiol–disulphide homeostasis than laparotomy. These findings indicate that minimally invasive approaches better maintain redox balance and antioxidant defence during embryo transfer procedures.
Murat Can Demir, Merve Sena Demir, Mustafa Makav, Semra Kaya, Taygun Gökdemir, Nail Tekin Önder, Mushap Kuru, Cihan Kaçar   +7 more
wiley   +1 more source

Blood Protozoan Infection Disrupts Ovarian Follicular Development in Dairy Cattle: A Mechanistic Link to Reproductive Failure

Veterinary Medicine and Science, Volume 12, Issue 4, July 2026.
Subclinical haemoprotozoan infection disrupts RBC integrity, and that leads to decreased Hb level and excess free iron in plasma. That subsequently impairs ovarian follicular development and thereby builds up a mechanistic link to reproductive failure in dairy cattle.
Most. Mousumi Akter, Md. Sadequl Islam, Md. Ashraful Islam, Md. Mahmudul Hasan, Rakibul Islam, Md. Mominul Islam, Md. Gausur Rahman, Md. Shafiqul Islam, Anup Kumar Talukder, Md. Bazlar Rashid   +9 more
wiley   +1 more source