Topic
Sperm motility
About: Sperm motility is a research topic. Over the lifetime, 13874 publications have been published within this topic receiving 416587 citations. The topic is also known as: sperm movement & GO:0097722.
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TL;DR: The results suggest that female mallards are not able to select sperm on a purely genetic basis and emphasize the importance of sperm quality in gaining paternity.
Abstract: Postcopulatory processes might play an important role in sexual selection. In theory, fertilization success could be controlled by females via selection of particular sperm within their reproductive tract, or it could be determined by sperm competition per se. In practice, these two mechanisms are difficult to disentangle. To assess the relative importance of both mechanisms we used artificial insemination in combination with measurements of sperm quality (swimming speed and motility) in mallards. In this species, females often lack behavioral control over copulations and hence may use postcopulatory mechanisms to optimize their reproductive output. One important factor affecting female fitness may be selection of genetically compatible males. To investigate the influence of sperm quality and parental relatedness on paternity we inseminated 12 groups of related females with a sperm mixture containing equal numbers of sperm from a brother and from an unrelated male. Paternity was independent of the relatedness of the siring male to the female but was significantly affected by long-term sperm swimming speed and motility. No interaction between relatedness and sperm quality on paternity was observed. These results suggest that female mallards are not able to select sperm on a purely genetic basis and emphasize the importance of sperm quality in gaining paternity. Copyright 2005.
113 citations
TL;DR: The authors compared a simple, two-layer Percoll density gradient technique with the swim-up technique for semen preparation in 128 men and found the Percoll technique significantly improved yield, percent motility, and absolute number of motile sperm recovered.
112 citations
TL;DR: Following a modified freezing protocol, epididymal spermatozoa can easily be frozen in small containers for IVF, with higher resultant motility and fertilization rates than with ejaculated semen.
112 citations
TL;DR: Cryopreservation led to a significant increase in sperm DNA fragmentation, DNA oxidation and caspase 3 activation, and Supplementation of the cryopreserved medium with quercetrin induced a significant improvement in post thaw sperm parameters, compared to those of control, regarding sperm motility, viability and DNA integrity.
112 citations
TL;DR: It is inferred that beta-CYP damaged the structure of testes and decreased sperm output by inducing oxidative stress.
112 citations