Results 11 to 20 of about 55,911 (260)
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
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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
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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
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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
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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
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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
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
Sperm morphology, sperm motility and paternity success in the bluethroat (Luscinia svecica). [PDF]
PLoS ONE, 2018 Postcopulatory sexual selection may select for male primary sexual characteristics like sperm morphology and sperm motility, through sperm competition or cryptic female choice.
Camilla Lo Cascio Sætre +3 more
doaj +1 more source
Analisis Motilitas Dan Morfologi Spermatozoa Pria perokok Usia 18-24 tahun
Majalah Kedokteran Andalas, 2023 Background: Smoking is one of lifestyle factors which lead to health problems in society. Smoke can decrease the quality of spermatozoa by various mechanisms, one of which is the seminal oxidative stress induced by Reactive Oxygen Species (ROS ...
yosha putri wahyuni
doaj +1 more source
Measurement and significance of sperm morphology [PDF]
Asian Journal of Andrology, 2010 The measurement or evaluation and clinical significance of human sperm morphology has always been and still is a controversial aspect of the semen analysis for the determination of a male's fertility potential. In this review the background of the development of the evaluation criteria for sperm morphology will be discussed. Aspects of criticism on the
Roelof, Menkveld +2 more
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