Results 11 to 20 of about 1,138,325 (289)
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 +7 more sources
Sperm Morphology in Neotropical Primates [PDF]
Animals, 2019 The morphological and morphometric characterization of spermatozoa has been used as a taxonomic and phylogenetic tool for different species of mammals. We evaluated and compared the sperm morphometry of five neotropical primate species: Alouatta caraya, Ateles belzebuth and Ateles chamek of family Atelidae; and Cebus cay (=Sapajus cay) and Cebus ...
Eliana R. Steinberg +5 more
openaire +4 more sources
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 +6 more sources
Postcopulatory sexual selection is associated with reduced variation in sperm morphology. [PDF]
PLoS ONE, 2007 The evolutionary role of postcopulatory sexual selection in shaping male reproductive traits, including sperm morphology, is well documented in several taxa.
Sara Calhim +2 more
doaj +1 more source
Abnormal Human Sperm Parameters Contribute to Sperm DNA Fragmentation in Men with Varicocele [PDF]
The World Journal of Men's Health, 2018 Purpose: This study was performed to evaluate and compare threshold sperm parameters and sperm DNA fragmentation index (DFI), and further analyzed whether sperm DFI could be predicted from sperm parameters in men with varicocele.
Yong-Seog Park +5 more
doaj +1 more source
Longer Sperm Swim More Slowly in the Canary Islands Chiffchaff
Cells, 2021 Sperm swimming performance affects male fertilization success, particularly in species with high sperm competition. Understanding how sperm morphology impacts swimming performance is therefore important.
Emily R. A. Cramer +6 more
doaj +1 more source
Sperm morphology and sperm velocity in passerine birds [PDF]
Proceedings of the Royal Society B: Biological Sciences, 2008 Sperm velocity is one of the main determinants of the outcome of sperm competition. Since sperm vary considerably in their morphology between and within species, it seems likely that sperm morphology is associated with sperm velocity. Theory predicts that sperm velocity may be increased by enlarged midpiece (energetic component) or flagellum length ...
Lüpold S +3 more
openaire +4 more sources
Exploration of the association between obesity and semen quality in a 7630 male population. [PDF]
PLoS ONE, 2015 This study aimed to explore the association between body mass index (BMI), other anthropometric indexes and semen quality in a general male population in Taiwan.
Chih-Wei Tsao +5 more
doaj +1 more source
Hydrodynamic propulsion of human sperm [PDF]
, 2009 The detailed fluid mechanics of sperm propulsion are fundamental to our understanding of reproduction. In this paper, we aim to model a human sperm swimming in a microscope slide chamber.
Green, Richard B. +7 more
core +1 more source
BMC Evolutionary Biology, 2018 Background Sexual selection continues after copulation via either sperm competition or cryptic female choice, and favors sperm traits that maximize sperm competitiveness.
Alfonso Rojas Mora +3 more
doaj +1 more source