Results 101 to 110 of about 65,346 (303)

Sperm Selection through Microvesicle-Mediated ChemotaxisInduced by Follicular Fluid and Cumulus Cells [PDF]

Cell Journal
Objective: Selecting the most competent sperm is crucial for improving the success of intracytoplasmic sperm injection(ICSI). Chemotaxis-based sperm selection may facilitate the selection of spermatozoa with superior motility andfertilization capability.
Tohid Rezaei Topraggaleh, Amir Fattahi, Ehsan Dadkhah, Behrooz Niknafs   +3 more
doaj   +1 more source

Studies on the sperm reservoir of the pig oviduct [PDF]

, 2003
During sperm transport in the female pig a proportion of spermatozoa are arrested, often for 24 h or more, in a particular segment of the utero-tubal junction (UTJ) and the adjacent tubal isthmus, where a sperm reservoir (SR) is built up.
Tienthai, Paisan
core  

The KIF6‐RBP Complex Orchestrates mRNA Transport Required for Sperm Flagellar Assembly

Advanced Science, EarlyView.
Two homozygous deleterious KIF6 variants are identified in unrelated men with impaired sperm motility. Mouse models and multi‐omics analyses reveal that KIF6 cooperates with the RNA‐binding proteins FMRP and FXR1 to deliver mRNAs essential for sperm flagellar assembly, linking disrupted mRNA transport to reduced abundance of key structural and ...
Chunbo Xie, Sibing Yi, Xinle Lin, Shen Zhang, Weili Wang, Shimin Yuan, Lanlan Meng, Yong Li, Chen Tan, Chunjia Wei, Yanyan Yu, Yaoqiong Liang, Huan Zhang, Liang Hu, Guangxiu Lu, Wenbin He, Qianjun Zhang, Juan Du, Ge Lin, Chaofeng Tu, Yue‐Qiu Tan   +20 more
wiley   +1 more source

Sperm selection methods in the 21st century

Biology of Reproduction, 2019
AbstractNatural sperm selection in humans is a rigorous process resulting in the highest quality sperm reaching, and having an opportunity to fertilize, the oocyte. Relative to other mammalian species, the human ejaculate consists of a heterogeneous pool of sperm, varying in characteristics such as shape, size, and motility.
Denis A Vaughan, Denny Sakkas
openaire   +2 more sources

The Comparison of HA Binding and Zeta Methods Efficiency in Selection of Sperm with Normal Morphology and Intact Chromatin

مجله دانشکده پزشکی اصفهان, 2009
Background: Sperm selection for ICSI is based on morphology and motility, but these parameters may not relevant chromatin integrity. One of the sperm selection methods for ICSI is based on sperm functional characteristics.
Mohammad Reza Deemeh, Mohammad Hossein Nasr-Esfahani, Shahnaz Razavi, Habibollah Nazem, Mahnaz Shayeste Moghadam, Marziye Tavalaee   +5 more
doaj  

Proteins involved in motility and sperm-egg interaction evolve more rapidly in mouse spermatozoa.

PLoS ONE, 2014
Proteomic studies of spermatozoa have identified a large catalog of integral sperm proteins. Rapid evolution of these proteins may underlie adaptive changes of sperm traits involved in different events leading to fertilization, although the selective ...
Alberto Vicens, Lena Lüke, Eduardo R S Roldan   +2 more
doaj   +1 more source

Computational Modelling of Sperm Behaviour in a 3D Virtual Oviduct [PDF]

, 2011
The processes by which individual sperm cells navigate the length and complexity of the female reproductive tract and then reach and fertilise the oocyte are fascinating. Numerous complex processes potentially influence the movement of spermatozoa within
Burkitt, Mark
core  

Sexual selection in the ant Leptothorax gredleri

, 2010
L. gredleri is an ant species that is mating by female calling. Virgin queens attract males with a droplet of a sexual pheromone in the vicinity of their maternal nest.
Oppelt, Angelika
core   +1 more source

eEF1G Orchestrates Translation to Ensure Meiotic Progression in Transcriptionally Quiescent Spermatocytes

Advanced Science, EarlyView.
eEF1G supports translation elongation of meiotic mRNAs in transcriptionally quiescent leptotene and zygotene spermatocytes. Its depletion in germ cells causes meiotic arrest at the zygotene stage, with defective homologous synapsis and unstable recombination intermediates.
Jianze Xu, Yuwei Hu, Xukun Lu, Yuling Cai, Tongtong Li, Ming Gao, Jinlong Ma, Yuan Gao, Shangming Liu, Zi‐Jiang Chen, Jing Meng, Hongbin Liu, Xiaohua Jiang   +12 more
wiley   +1 more source

Male attractiveness is negatively genetically associated with investment in copulations

, 2011
In species with high male mating effort, there is a trade-off between mating effort spent in a current mating and resources left for future matings. Males are therefore expected to allocate resources prudently across successive matings.
Engqvist, Leif, Leif Engqvist, Engqvist, Leif ; https://orcid.org/   +2 more
core   +1 more source