Results 21 to 30 of about 157,835 (298)
Rheotaxis-based sperm separation using a biomimicry microfluidic device
Scientific Reports, 2021 Sperm selection is crucial to assisted reproduction, influencing the success rate of the treatment cycle and offspring health. However, in the current clinical sperm selection practices, bypassing almost all the natural selection barriers is a major ...
Iman Ramazani Sarbandi +3 more
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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 ...
Goetz, AT, Pound, N, Shackelford, TK
core +2 more sources
Novel distance-progesterone-combined selection approach improves human sperm quality
Journal of Translational Medicine, 2018 Background Sperm selection is essential for the health of offspring conceived via assistive reproductive technology (ART). Various methods of sperm preparation for in vitro fertilization and intracytoplasmic sperm injection have been developed to acquire
Kun Li +6 more
doaj +1 more source
Cells, 2021 We present a new method for the selection of individual sperm cells using a microfluidic device that automatically traps each cell in a separate microdroplet that then individually self-assembles with other microdroplets, permitting the controlled ...
Yuval Atzitz +3 more
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Co-evolution of male and female reproductive traits across the Bruchidae (Coleoptera) [PDF]
, 2008 1. Despite the obvious importance of spermatozoa to individual reproductive success a general explanation of variation in spermatozoan form and function is still lacking. In species with internal fertilization, sperm not only have to interact with the
Andrés +57 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
doaj +1 more source
Cryptic female choice favours sperm from major histocompatibility complex-dissimilar males [PDF]
, 2013 Cryptic female choice may enable polyandrous females to avoid inbreeding or bias offspring variability at key loci after mating. However, the role of these genetic benefits in cryptic female choice remains poorly understood. Female red junglefowl, Gallus
Alcaide M +8 more
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Effect of competitive cues on reproductive morphology and behavioral plasticity in male fruitflies [PDF]
, 2015 Phenotypic plasticity will be favored whenever there are significant fitness benefits of responding to environmental variation. The extent and nature of the plasticity that evolves depends on the rate of environmental fluctuations and the capacity to ...
Bretman, Amanda +3 more
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Fertilization capacity with rainbow trout DNA-damaged sperm and embryo developmental success [PDF]
, 2010 Mammalian spermatozoa undergo a strong selection process along the female tract to guarantee fertilization by good quality cells, but risks of fertilization with DNA-damaged spermatozoa have been reported.
Ahmadi +31 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
doaj +1 more source