Results 31 to 40 of about 158,096 (183)

Sperm selection before intracytoplasmic sperm injection

open access: yesCurrent Trends in Clinical Embriology, 2015
In assisted reproduction techniques (ART), the success of embryo development depends mostly on the quality of gametes, and pregnancy outcome is strictly related to both the oocyte and the fertilizing sperm quality. Therefore, during ART, it is mandatory to select a mature and viable sperm with high DNA integrity. Routine sperm preparation and selection
TALEVI, RICCARDO, GUALTIERI, ROBERTO
openaire   +2 more sources

Evolution of protamine genes and changes in sperm head phenotype in rodents [PDF]

open access: yes, 2016
Little is known about the genetic basis of evolutionary changes in sperm phenotype. Postcopulatory sexual selection is associated with differences in protamine gene sequences and promoters and is a powerful force acting on sperm form and function ...
Lüke, Lena   +3 more
core   +1 more source

Sexual selection of protamine 1 in mammals [PDF]

open access: yes, 2015
Protamines have a crucial role in male fertility. They are involved in sperm chromatin packaging and influence the shape of the sperm head and, hence, are important for sperm performance.
Lüke, Lena   +2 more
core   +1 more source

Maintenance of sperm variation in a highly promiscuous wild bird. [PDF]

open access: yesPLoS ONE, 2011
Postcopulatory sexual selection is an important force in the evolution of reproductive traits, including sperm morphology. In birds, sperm morphology is known to be highly heritable and largely condition-independent.
Sara Calhim   +4 more
doaj   +1 more source

Viscous Cervical Environment-on-a-Chip for Selecting High-Quality Sperm from Human Semen

open access: yesBiomedicines, 2021
When ejaculated sperm travels through the vagina to the uterus, mucus secreted by the cervical canal generally filters out sperm having low motility and poor morphology.
Manhee Lee   +12 more
doaj   +1 more source

FertDish: microfluidic sperm selection-in-a-dish for intracytoplasmic sperm injection [PDF]

open access: yesLab on a Chip, 2021
The FertDish features a clinically applicable sperm processing format, and enables high recovery of motile sperm with high DNA quality.
Sa Xiao   +7 more
openaire   +3 more sources

Positive selection in the adhesion domain of Mus sperm Adam genes through gene duplications and function-driven gene complex formations [PDF]

open access: yes, 2013
Background: Sperm and testes-expressed Adam genes have been shown to undergo bouts of positive selection in mammals. Despite the pervasiveness of positive selection signals, it is unclear what has driven such selective bouts.
Civetta, Alberto, Grayson, Phil
core   +2 more sources

Frequency of Sperm DNA Fragmentation According to Selection Method: Comparison and Relevance of a Microfluidic Device and a Swim-up Procedure [PDF]

open access: yesJournal of Clinical and Diagnostic Research, 2015
Introduction: Multiple rounds of centrifugation or washing spermatozoa can cause sperm DNA fragmentation (SDF); however, a microfluidic approach to select spermatozoa does not require centrifugation.
Kanako Kishi   +7 more
doaj   +1 more source

Sperm morphology and DNA fragmentation after zona pellucida selection

open access: yesReproduction and Fertility, 2021
Sperm DNA fragmentation (SDF) and sperm morphological defects can negatively affect ART outcomes. Consequently, there is a need for additional semen processing technique that accounts for sperm DNA status and morphology prior to ICSI.
Rumiana Ganeva   +5 more
doaj   +1 more source

Unraveling the sperm bauplan: Relationships between sperm head morphology and sperm function in rodents [PDF]

open access: yes, 2017
This is the author accepted manuscript. The final version is available from the Society for the Study of Reproduction via the DOI in this record.Rodents have spermatozoa with features not seen in other species. Sperm heads in many rodent species bear one
Bastir, M   +3 more
core   +1 more source

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