Selection for longer lived sperm within ejaculate reduces reproductive ageing in offspring
Evolution Letters, 2019 Males produce numerous sperm in a single ejaculate that greatly outnumber their potential egg targets. Recent studies found that phenotypic and genotypic variation among sperm in a single ejaculate of a male affects the fitness and performance of the ...
Ghazal Alavioon +4 more
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The repeatable opportunity for selection differs between pre‐ and postcopulatory fitness components
Evolution Letters, 2021 In species with multiple mating, intense sexual selection may occur both before and after copulation. However, comparing the strength of pre‐ and postcopulatory selection is challenging, because (i) postcopulatory processes are generally difficult to ...
Lucas Marie‐Orleach +2 more
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Intramale variation in sperm size: functional significance in a polygynous mammal [PDF]
PeerJ, 2015 Studies concerning the relationships between sperm size and velocity at the intraspecific level are quite limited and often yielded contradictory results across the animal kingdom.
José Luis Ros-Santaella +2 more
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Sperm bauplan and function and underlying processes of sperm formation and selection
Physiological Reviews, 2022 The spermatozoon is a highly differentiated and polarized cell, with two main structures: the head, containing a haploid nucleus and the acrosomal exocytotic granule, and the flagellum, which generates energy and propels the cell; both structures are connected by the neck.
Maria Eugenia Teves +1 more
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Taiwanese Journal of Obstetrics & Gynecology, 2015 Objective: To evaluate if hyaluronic acid (HA)-bound spermatozoa surpassed conventional microscopy-selected spermatozoa in the status of sperm DNA integrity by acridine orange (AO) fluorescence staining.
Meng-Ting Huang +5 more
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Viscous Cervical Environment-on-a-Chip for Selecting High-Quality Sperm from Human Semen
Biomedicines, 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
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Frequency of Sperm DNA Fragmentation According to Selection Method: Comparison and Relevance of a Microfluidic Device and a Swim-up Procedure [PDF]
Journal 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
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Experimental evolution of sperm competitiveness in a mammal
BMC Evolutionary Biology, 2011 Background When females mate with multiple partners, sperm from rival males compete to fertilise the ova. Studies of experimental evolution have proven the selective action of sperm competition on male reproductive traits.
Simmons Leigh W, Firman Renée C
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Maintenance of sperm variation in a highly promiscuous wild bird. [PDF]
PLoS 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
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Sperm morphology and DNA fragmentation after zona pellucida selection
Reproduction 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
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