Results 141 to 150 of about 114,907,480 (246)

An improved method for chromosome preparations from bovine oocytes and zygotes obtained by in vitro maturation and fertilization techniques

, 2010
Matured bovine oocytes and zygotes obtained by in vitro maturation and fertilization techniques (IVM and IVF) were cytogenetically prepared by using an improved method for chromosome preparations. The method, which involves use of trypsinizedhypotonic solution plus a vortex-agitated system and very cold two-step fixation process, contributes to weaken ...
Ocaña Quero, J.M., Ortega Mariscal, M.A., Pinedo Merlín, M., Moreno-Millán, M.   +3 more
openaire   +1 more source

Divergent effects of hyperandrogenemia on the female reproductive neuroendocrine axis under different physiological conditions

Journal of Neuroendocrinology, Volume 38, Issue 10, October 2026.
Abstract The hypothalamic–pituitary–gonadal (HPG) axis coordinates reproductive function and incorporates gonadal sex steroid feedback to regulate gonadotropin secretion in a homeostatic manner. In females, ovarian estrogens and progestins act as the primary negative feedback signals to suppress luteinizing hormone (LH) release, whereas in males ...
Lillian Rose, Alexander S. Kauffman
wiley   +1 more source

The CaM1‐CBP60b‐MYB77 Transcriptional Cascade Regulates K+ Homeostasis and Salt Tolerance in Barley

Plant Biotechnology Journal, Volume 24, Issue 10, Page 5248-5265, October 2026.
ABSTRACT Soil salinity is a major abiotic stress that threatens global crop productivity. Calcium (Ca2+) is a pivotal second messenger in plant stress signalling, but how Ca2+ sensors such as calmodulin (CaM) transcriptionally control ion homeostasis and salt tolerance remains largely understood in crops.
Yunfeng Xu, Haoran Sun, Lijun Liu, Qiyu Liang, Ling Shen, Ailing Han, Liangbo Fu, Fengyue Wang, Shanggeng Xie, Jiangyan Xiong, Yishan Tu, Zhengyuan Xu, Kangfeng Cai, Lingzhen Ye, Shengguan Cai, Zhong‐Hua Chen, Dezhi Wu, Guoping Zhang, Qiufang Shen   +18 more
wiley   +1 more source

Cross-Species Insights into In Vitro Maturation Defects of the Oocyte and Identification of Crucial Regulators for Sheep Oocyte Maturation

The poor quality of oocytes matured in vitro seriously hinders the application in mammalian assisted reproductive technology (ART). Exploring the regulators and mechanisms influencing oocyte maturation is critical to improve the developmental competence ...
He, Lixia, Dayong Chen, Wang, Yubing, Tian, Jianhui, Zhang, Jiaxin, Xiurong Zhao, Lixia He, Chunjuan Qiu, Hao, Jia, Zhao, Xiurong, Chen, Dayong, Jia Hao, Liu, Xingyuan, Lei Cheng, Guangyin Xi, Jianhui Tian, Jinfu Rong, Qiu, Chunjuan, Wang, Wenjing, Jian Cui, Cui, Jian, Cheng, Lei, Xi, Guangyin, Xingyuan Liu, Jiaxin Zhang, Yubing Wang, Wenjing Wang, Rong, Jinfu   +27 more
core   +1 more source

Freezing the Biological Clock: A Viable Fertility Preservation Option for Young Singaporean Women? [PDF]

, 2013
In March 2012, an article in The Straits Times entitled ‘Freezing eggs could reverse falling birth rate’ suggested that employing the latest oocyte cryopreservation techniques could both foster individual women’s reproductive autonomy and impact ...
Lee, Geok Ling, Yee, Samantha, Blyth, Eric   +2 more
core  

Seminal Extracellular Vesicles as Molecular Modulators of Male Reproductive Function

Reproduction in Domestic Animals, Volume 61, Issue S3, October 2026.
ABSTRACT Extracellular vesicles (sEVs) contained in seminal plasma (SP) maintain, in concert with free SP‐components (proteins, hormones, cytokines, metabolites and antioxidants) under an endocrine umbrella the functional in vivo homeostasis of ejaculated spermatozoa. The sEVs define a generic mixture of nanovesicles delivered by male epithelial cells,
Heriberto Rodriguez‐Martinez, Jordi Roca, Fernando Peña Vega, Emilio A. Martinez   +3 more
wiley   +1 more source

Damages of Freezing on the Development of Oocyte and Embryos [PDF]

Majallah-i Dānishgāh-i ’Ulūm-i Pizishkī-i Shahīd Ṣadūqī Yazd
Introduction: To assist save endangered species from extinction and to aid in their care, it is crucial to sustaining their reproductive capacity. The fetus's life and growth processes begin at conception and proceed in accordance with a biological clock'
Pegah Shayegh, Fatemeh Rahmati, Farzaneh Baniasadi, Meisam Jangkhah, Hasan Rajabimaham, Mohammad Reza Ghalamboran, Rouhollah Fathi   +6 more
doaj  

Extracellular Vesicles From Heat‐ and Oxidative‐Stressed Granulosa Cells Improve Redox Balance and Embryo Development in Bovine Oocytes

Reproduction in Domestic Animals, Volume 61, Issue S3, October 2026.
ABSTRACT In vitro culture (IVC) exposes oocytes to suboptimal conditions that may disrupt redox homeostasis and compromise developmental competence. Extracellular vesicles (EVs) mediate intercellular communication, and their cargo reflects the physiological state of donor cells.
Judith Diaz‐Muñoz, Yulia N. Cajas, Karina Cañón‐Beltrán, Sonia Gago, Carlos Olegario Hidalgo, Manel López‐Béjar, Dimitrios Rizos, Teresa Mogas   +7 more
wiley   +1 more source

Molecular Regulation of Post‐Hatching Embryo Development: Implications for Early Pregnancy Losses in Livestock Species

Reproduction in Domestic Animals, Volume 61, Issue S3, October 2026.
ABSTRACT Pregnancy loss (PL) remains a major limitation to reproductive efficiency in livestock, with a substantial proportion originating during early embryo development, particularly between blastocyst hatching and implantation. This developmental window encompasses complex processes of lineage differentiation and morphogenesis. Accumulating evidence
Alexia Siegmund‐Sabater, Nuria Martínez de los Reyes, Inés Flores‐Borobia, Leopoldo González‐Brusi, Beatriz Galiano‐Cogolludo, Pilar Marigorta, Pablo Bermejo‐Álvarez, Priscila Ramos‐Ibeas   +7 more
wiley   +1 more source

Oxidative and Mitochondrial Status of Vitrified Equine In Vitro Matured Oocytes Using Temperature‐Specific Equilibration Protocols

Reproduction in Domestic Animals, Volume 61, Issue S3, October 2026.
ABSTRACT Cryopreservation of equine in vitro matured (IVM) oocytes remains a major challenge in assisted reproduction due to their high susceptibility to cryoinjury, including oxidative stress and mitochondrial dysfunction. The aim of this study was to evaluate the physiological status of vitrified/warmed equine IVM oocytes following vitrification ...
Sonia Gago, Meritxell Vendrell‐Flotats, Judith Diaz‐Muñoz, Mariví Soriano‐Moya, Mònica Acacio, Enric Mestres, Nuno Costa‐Borges, Teresa Mogas   +7 more
wiley   +1 more source