Results 121 to 130 of about 129,614 (356)
Andrologia, 2013 Intracytoplasmic morphologically selected sperm injection (IMSI, 6300× magnification with Nomarski contrast) of a normal spermatozoon with a vacuole‐free head could improve the embryo's ability to grow to the blastocyst stage and then implant.
I. Hammoud +8 more
semanticscholar +1 more source
Successful ICSI in Mice Using Caput Epididymal Spermatozoa
Frontiers in Cell and Developmental Biology, 2019 Spermatozoa undergo their last phase of spermiogenesis, known as maturation, as they pass through the epididymis. A recent report indicates that mouse immature spermatozoa retrieved from the caput epididymis for intracytoplasmic sperm injection (ICSI ...
Raúl Fernández-González +6 more
doaj +1 more source
Locomotion of C. elegans in Structured Environments [PDF]
arXiv, 2010 Undulatory locomotion of microorganisms like soil-dwelling worms and spermatozoa, in structured environments, is ubiquitous in nature. They navigate complex environments consisting of fluids and obstacles, negotiating hydrodynamic effects and geometrical constraints.
arxiv
Seminal plasma: an essential attribute to spermatozoa.
Journal of Andrology, 2012 The biochemical composition of seminal plasma (SP) is very complex and variable among species. Advances in reproductive technologies reveal SP as a nutritive-protective medium for sperm cells suspended in it, and some SP components are very important for
N. Juyena, C. Stelletta
semanticscholar +1 more source
Journal of Forensic Sciences, EarlyView.Abstract Following an alleged sexual assault, a victim may undergo a medical examination whereby internal or external bodily swabs may be collected and submitted to a forensic laboratory to be screened for the presence of semen. At Forensic Science SA (FSSA), this involves microscopic examination of a smear prepared from each swab for the presence of ...
Dan Nana Osei Bonsu +3 more
wiley +1 more source
Zoologia (Curitiba), 2010 This study describes the morphological, morphometric and ultrastructural characteristics of the Amazonian manatee Trichechus inunguis (Natterer, 1883) spermatozoon. The spermatozoa were obtained from a urine sample of an adult T.
Rodrigo S. Amaral +4 more
doaj +1 more source
Effect of Spiroplasma infection on the mating behavior of Glossina fuscipes fuscipes
Insect Science, EarlyView.Abstract Tsetse flies are insects of significant public health and zoonotic importance as they are the main vectors of African trypanosomes. To date, an effective vaccine is unavailable and efforts to limit the spread of the disease primarily rely on controlling the tsetse populations.
Giulia Fiorenza +14 more
wiley +1 more source
Why so many sperm cells? [PDF]
arXiv, 2014 A key limiting step in fertility is the search for the oocyte by spermatozoa. Initially, there are tens of millions of sperm cells, but a single one will make it to the oocyte. This may be one of the most severe selection processes designed by evolution, whose role is yet to be understood. Why is it that such a huge redundancy is required and what does
arxiv
Apoptosis and DNA damage in human spermatozoa.
Asian Journal of Andrology, 2011 DNA damage is frequently encountered in spermatozoa of subfertile males and is correlated with a range of adverse clinical outcomes including impaired fertilization, disrupted preimplantation embryonic development, increased rates of miscarriage and an ...
R. Aitken, A. Koppers
semanticscholar +1 more source
Aging Cell, EarlyView.In Qprt‐deficient mice, testicular NAD+ levels decline accelerated with age, leading to mitochondrial dysfunction, disrupted DSB repair, impaired meiotic sex chromosome inactivation, and germ cell loss. Nicotinamide riboside (NR) supplementation restores NAD+ levels and alleviates these defects, highlighting the importance of NAD+ de novo synthesis in ...
Yining Xu +9 more
wiley +1 more source