Results 91 to 100 of about 14,069,776 (341)
Joint and individual associations between multiple vitamins and sperm quality in adult men
Frontiers in NutritionBackgroundSeveral studies have suggested that a healthy diet is associated with improved male fertility outcomes. However, the joint and individual associations between the status of multiple vitamins and sperm quality remain unclear.ObjectivesThis study
Wen Yao +9 more
doaj +1 more source
Sperm allocation in relation to female size in a semelparous salmonid [PDF]
Royal Society Open Science, 2016 To maximize reproductive success, males have to adaptively tailor their sperm expenditure in relation to the quality of potential mates because they require time to replenish their sperm supply for subsequent mating opportunities.
Yuya Makiguchi +6 more
doaj +1 more source
Effects of altered epididymal sperm transit time on sperm quality [PDF]
International Journal of Andrology, 2008 SummaryThe epididymal sperm transit time seems to have an important role in the process of sperm maturation, and it seems that alterations to the transit can harm the process. The aim of the present work was to evaluate the influence of altered sperm transit time through the epididymis on sperm parameters and fertility of rats, as well as the role of ...
Fernandez, Carla Dal Bianco +3 more
openaire +3 more sources
Nonreciprocal Swarmalators With Reconfigurable and Controllable Formations for Robot Collectives
Advanced Robotics Research, EarlyView.Nonreciprocal swarmalator interactions are enabled through control barrier functions to transform self‐organizing robot collectives into reconfigurable, constraint‐aware systems. Complex two‐ and three‐dimensional shapes, continuous morphing, obstacle‐aware navigation, collective splitting, and object transport emerge from modulating agent‐level ...
Kush Patel +3 more
wiley +1 more source
Advanced Science, EarlyView.Stem cell differentiation follows a conserved surface condensate trajectory: H3K27ac super enhancers nucleate large RNA polymerase II clusters that grow and unfold before transcriptional activity disperses them. This work reveals how biophysical forces at enhancer surfaces dynamically build and dismantle stem cell transcription hubs, reshaping cell ...
Tim Klingberg +18 more
wiley +1 more source
The association between sperm aneuploidy and male infertility: Screening, aetiology and possible routes to alternative therapy [PDF]
, 2003 This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.One in six couples wishing to start a family are infertile.
Tempest, Helen Ghislaine
core +3 more sources
European Journal of Cell Biology, 2022 Unexplained infertility affects about one-third of infertile couples and is defined as the failure to identify the cause of infertility despite extensive evaluation of the male and female partners.
Ankit Jaiswal +10 more
doaj +1 more source
Decline in human sperm counts during the past 50 years? [PDF]
, 2005 There is widespread concern that environmental pollutants acting as xenoestrogens may affect human fertility adversely. Whether this has already made an impact on human fertility worldwide remains debatable at the present stage.
Souza, Urban JAD +2 more
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Advanced Science, EarlyView.This study uncovers a metabolic‐epigenetic axis licensing zygotic genome activation (ZGA) in mouse embryos. A developmental decline in NAD+ levels activates PARP7, which mono‐ADP‐ribosylates and stabilizes UHRF1. This modification promotes the establishment of permissive histone acetylation marks, thereby facilitating timely ZGA.
Guangyi Cao +13 more
wiley +1 more source
Sperm competition and sperm length in shorebirds [PDF]
, 1999 We investigated how sperm morphology varies across 16 species of shorebirds in the Scolopacidae, Charadriidae, and Jacanidae. Sperm were significantly longer in nonmonogamous than in socially monogamous species.
Briskie, J V, Johnson, D D P
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