Psychological and physiological adaptations to sperm competition in humans [PDF]
, 2005 Postcopulatory competition between males, in the form of sperm competition, is a widespread phenomenon in many animal species. The extent to which sperm competition has been an important selective pressure during human evolution remains controversial ...
Pound, N, Goetz, AT, Shackelford, TK
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Methylation Status of Imprinted Genes and Repetitive Elements in Sperm DNA from Infertile Males [PDF]
, 2011 Stochastic, environmentally and/or genetically induced disturbances in the genome-wide epigenetic reprogramming processes during male germ-cell development may contribute to male infertility.
Tresch, A. +15 more
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Sperm competition and male forceps dimorphism in the European earwig Forficula auricularia (Dermaptera: Forficulina) [PDF]
, 2008 Some portions of this electronic text have been removed owing to copyright restrictionsThe European earwig exhibits a remarkable male-dimorphism in forceps morphology that is associated with alternative reproductive tactics under the control of a ...
Brown, Gordon S.
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Sperm morphology and evidence for sperm competition among parrots [PDF]
Journal of Evolutionary Biology, 2019 AbstractSperm competition is an important component of postâcopulatory sexual selection that has shaped the evolution of sperm morphology. Previous studies have reported that sperm competition has a concurrently directional and stabilizing effect on sperm size.
Luisana Carballo +6 more
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Comparison of Special Stains for Analysing the Morphology of Sperm: A Cross-sectional Study [PDF]
National Journal of Laboratory MedicineIntroduction: In India, male infertility constitutes 40% of infertility cases in males, which has become a serious problem in developing countries. Numerous studies and advanced techniques have been identified in assessing sperm morphology. The detection
Preethi Murali +2 more
doaj +1 more source
Effects of season and single layer centrifugation on bull sperm quality in Thailand [PDF]
Asian-Australasian Journal of Animal Sciences, 2020 Objective The aim of study was to investigate the effects of season and single layer centrifugation (SLC) before cryopreservation on post-thaw bull sperm quality in Thailand.
Thanapol Nongbua +5 more
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Relationship between sperm morphology and sperm DNA dispersion
Translational Andrology and Urology, 2020 The pathogenesis of teratozoospermia (30%) and a higher odds ratio (OR) for having high SDF levels were found in the group of men with teratozoospermia vs. men without teratozoospermia. However, the receiving operating characteristic (ROC) curve analysis indicated that a SDF >18% was a significant negative predictive value to distinguish between men ...
Jakubik-Uljasz, Joanna +3 more
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Sperm Morphology and Male Age in Black-Throated Blue Warblers, an Ecological Model System
Animals, 2020 Extra-pair paternity may drive selection on spermatozoa and ejaculate characteristics through sperm competition and cryptic female choice. Here, we examine sperm morphology in the black-throated blue warbler (Setophaga caerulescens), an ecological model ...
Emily Cramer +3 more
doaj +1 more source
Sperm competition games: optimal sperm allocation in response to the size of competing ejaculates [PDF]
, 2007 Engqvist L, Reinhold K. Sperm competition games: optimal sperm allocation in response to the size of competing ejaculates. Proceedings of the Royal Society B.
Reinhold, Klaus +1 more
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Association between Sperm Morphology and Altered Sperm microRNA Expression
Biology, 2022 Evaluation of male infertility has been based on semen analysis for years. As this method can be subjective at times, there is a scientific tendency to discover stable and quantifiable biomarkers. This study included 28 couples who underwent an in vitro fertilization/intracytoplasmic sperm injection (IVF/ICSI) cycle.
Maja Tomic +5 more
openaire +4 more sources