Results 111 to 120 of about 141,242 (314)

Regulation of the maternal-to-embryonic transition in "C. elegans" [PDF]

, 2012
Reproduction is a fundamental process of life which allows the survival of each species through the birth of young species members. Several modes of reproduction evolved and are classified into sexual and asexual reproduction.
Finger, Susanne
core   +1 more source

Non-invasive assessment of stem cell DNA integrity in response to environmental stressors

Scientific Reports
The maintenance of DNA integrity in spermatogonial stem cells (SSCs) is essential for ensuring genetic stability and proper function in male germline cells.
Juan Wang, Yue Zhou, Lifan Zhuo, Bei Yan, Lianghong Ma   +4 more
doaj   +1 more source

Sperm Competition and the Function of Masturbation in Japanese Macaques (Macaca fuscata)

, 2001
Male masturbation or sexual-auto stimulation is well documented in humans. This study dealt with the occurrence of masturbation in non-human primates in general, and in Japanese macaques (Macaca fuscata) in particular, from the perspective of ...
Thomsen, Ruth
core  

Reduced glutathione and cysteine hydrochloride on crossbred bull semen

, 2012
Over the last few years, good quality freezable semen was not utilized effectively due to less knowledge about the freezability of semen. One reason is the lack of sufficient antioxidants in the seminal plasma and semen extender.
P Perumal
core   +1 more source

Early stages of tooth development in the harbor porpoise Phocoena phocoena

The Anatomical Record, EarlyView.
Abstract Here we describe the stages of tooth development in toothed whales on the basis of the harbor porpoise (Phocoena phocoena). The aim of the study was to find out whether these stages are identical to those of other mammals analyzed so far although toothed whales are homodont and monophyodont.
Lasse M. Mathes, Lennart Müller‐Thomsen, Stefan Huggenberger   +2 more
wiley   +1 more source

Fertility preservation in male adolescents with cancer (2011–2020): A retrospective study in China

Cancer Medicine
Background According to the studies, more than 80% of pediatric patients with cancer can achieve a survival rate greater than 5 years; however, long‐term chemotherapy and/or radiation therapy may seriously affect their reproductive ability.
Shasha Liu, Qiling Wang, Wenbing Zhu, Zhou Zhang, Wenhao Tang, Huiqiang Sheng, Jigao Yang, Yushan Li, Xiaowei Liang, Tianqing Meng, Zhiqiang Wang, Faxi Lin, Hao Dong, Xiaojin He, Xianglong Jiang, Shanjun Dai, Aiping Zhang, Chunying Song, Zuowen Liang, Feng Zhang, Xiaojun Wang, Peiyu Liang, Guihua Gong, Xiaohong Huai, Yanyun Wang, Fuping Li, Xinzong Zhang   +26 more
doaj   +1 more source

Geographical association of heavy metal exposure and semen quality: A national multi-center study

Ecotoxicology and Environmental Safety
Background: Assessing the adverse effects of geographical heavy metal mixture exposure on human semen quality is challenging. Our study aims to quantify the impact of these heavy metals on semen quality under both individual and combined exposures ...
Zhipeng Zhu, Xiaoqing Ni, Yong Zhu, Zhou Zhang, Peiyu Liang, Zuowen Liang, Qunshan Shen, Feifei Fu, Qing Tan, Xiaohong Mao, Lei Ge, Hang Li, Dongyue Chai, Can Sun, Zhiwen Tao, Feng Jiang, Jigao Yang, Jianfeng Liu, Zhixiang Fang, Yunxia Cao, Guihua Gong, Xiaojun Wang, Yichao Huang, Yushan Li, Xinzong Zhang, Xiaojin He   +25 more
doaj   +1 more source

Lowering Sperm Dose Rates in Frozen Semen for Bovine Artificial Breeding

, 2007
The New Zealand Dairy industry relies on artificial breeding to produce high genetic merit replacement stock. Proven bull semen is extended and preserved as either ambient temperature product or as frozen doses.
Pitt, Colin John
core  

Role of histone methylation in paternal transmission of epigenetic information [PDF]

, 2010
During the development of multi-cellular organisms, one genome gives rise to multiple differentiated cell types. This is achieved by sequence specific transcription factors and different epigenetic mechanisms, which collaborate in reading the genetic ...
Brykczynska, Urszula
core   +1 more source

Tracing the evolutionary history of the morpho‐anatomy of baculum in primates

The Anatomical Record, EarlyView.
Abstract Animal morphology reflects both evolutionary history and present‐day adaptation. Male mammal copulatory structures such as the baculum (penile bone) are ideal for studying these processes because of their complexity and high interspecific variability. In primates, however, research has focused mostly on baculum length.
Federica Spani, Maria Pia Morigi, Matteo Bettuzzi, Monica Carosi   +3 more
wiley   +1 more source