Results 311 to 320 of about 103,424 (339)
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Sperm Motility, Velocity and Migration
British Journal of Urology, 1990Summary— Four different methods for evaluating sperm motility were analysed for experimental error: subjective assessment of a wet film preparation, sperm velocity measured by time‐lapse photography, sperm velocity measured by computer analysis and sperm migration across a nucleopore membrane.Subjective assessment of motility was found to be ...
W. V. Holt +5 more
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The influence of prostaglandins on sperm motility
Prostaglandins, 1981Prostaglandin E2 and F2 alpha were measured in ejaculates from 10 fertile and 55 infertile men. Prostaglandin F2 alpha was negatively correlated with motility (r = 0.77; p less than 0.01) in normal men. In patients with disturbed fertility, prostaglandin F2 alpha was always higher than in the controls, while prostaglandin E2 was elevated only in ...
Eberhard Nieschlag +3 more
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Metabolism of motile zebrafish sperm
Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2011As metabolism of motile fish sperm is not well understood, the current study examined the metabolism of saline-activated zebrafish (Danio rerio) sperm. Activation of sperm with inhibitors of oxidative phosphorylation (potassium cyanide, 2,4 dinitrophenol or carbonyl cyanide 3-cholorophenylhydrazone) negatively impacted sperm motility by 60-90 s ...
Rolf L. Ingermann +3 more
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Regulation of Mammalian Sperm Motility
Archives of Andrology, 1989The physiological regulation of sperm motility has become more amendable to investigation since the demonstration that cAMP and calcium play a role in modulating the functioning of the flagellar axoneme. Although the external triggering mechanisms that initiate motility and capacitation are still unknown, evidence supports a modification of the calcium
Kathleen S. Kanous, Charles B. Lindemann
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Pharmacological stimulation of sperm motility
Human Reproduction, 1994The treatment of male factor infertility is a rapidly developing field. The introduction of microsurgical fertilization techniques allows assisted conception units to treat couples who previously would not have benefited from in-vitro fertilization techniques.
Antonino Guglielmino +4 more
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Sperm Motility in the Rat Epididymis
Fertility and Sterility, 1974The development of sperm motility was studied in rats with ligated caput epididymidis to determine whether intrinsic or extrinsic factors were involved. Most sperm moved in circular patterns; sperm from the ligated caput showed more motility after 7 to 10 days retention but none showed motion of the mature progressive type.
Eduardo S. Tovar, Mario H. Burgos
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Sperm Motility Assessment by Videomicrography
Fertility and Sterility, 1981A technically simple, inexpensive method is described for measuring objective parameters of sperm motility. The instruments involved are commercially available, home-oriented videotape equipment. Quantitative measurements of sperm motility are made directly from the video image and are facilitated by use of an analysis transparency that is applied as ...
David F. Katz, James W. Overstreet
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Bacterial effect on sperm motility
Urology, 1975Human semen containing normal number of sperm was exposed to concentrations of Escherichia coli varying from 500 to 10-8 colonies per cubic centimeter. A significant decrease in motility was abserved at 10-6 colonies per cubic centimeter.
Edward R. Bannister +2 more
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The Effects of Prostaglandins on Sperm Motility
Fertility and Sterility, 1977Inflammatory exudates around intrauterine devices were found to produce large concentrations of prostaglandin F2alpha. To evaluate the effect of this substance, 100 semen specimens were incubated in concentrations 100 times greater than that found in normal semen. Motility indices were calculated, and significant inhibition of sperm motility was found.
Marc S. Cohen +3 more
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2017
Spermatozoa motility is a very important attribute most commonly exploited for discriminating between a good and a bad semen sample at the fresh as well as post-cryopreservation stage. Accurate measurement of motility provides crucial information about viability of spermatozoa as well.
Megha Pande, N. Srivastava
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Spermatozoa motility is a very important attribute most commonly exploited for discriminating between a good and a bad semen sample at the fresh as well as post-cryopreservation stage. Accurate measurement of motility provides crucial information about viability of spermatozoa as well.
Megha Pande, N. Srivastava
openaire +2 more sources