Results 311 to 320 of about 110,058 (355)

Pharmacological stimulation of sperm motility

Human Reproduction, 1994
The 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.
F, Lanzafame, M G, Chapman, A, Guglielmino, C M, Gearon, R G, Forman   +4 more
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Regulation of Mammalian Sperm Motility

Archives of Andrology, 1989
The 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
C B, Lindemann, K S, Kanous
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Caffeine and sperm motility

Fertility and Sterility, 1983
Six different doses of caffeine were used to study its effect on human spermatozoal motility. The recently developed method for assessment of sperm motility by videomicrography was used to determine the percentage of sperm motility, swimming speed (velocity), percentage of progressive sperm, and progressive swimming speed.
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Mitochondrial PKA mediates sperm motility

Biochimica et Biophysica Acta (BBA) - General Subjects, 2014
Mitochondria are the major source of ATP to power sperm motility. Phosphorylation of mitochondrial proteins has been proposed as a major regulatory mechanism for mitochondrial bioenergetics.Sperm motility was measured by a computer-assisted analyzer, protein detection by western blotting, membrane potential by tetramethylrhodamine, cellular ATP by ...
Rashel, Mizrahi, Haim, Breitbart
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Angiotensin II stimulates sperm motility

Regulatory Peptides, 1996
The physiological factors which induce and maintain mammalian sperm maturation and motility generally remain unclear, although several agents are known to be involved. We recently described the application of immunocytochemical and immunoblotting methods to identify the angiotensin II type 1 (AT1) receptor in the tails of ejaculated rat and human sperm,
G P, Vinson, J, Mehta, S, Evans, S, Matthews, J R, Puddefoot, E, Saridogan, W V, Holt, O, Djahanbakhch   +7 more
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Urogenital infection and sperm motility

Andrologia, 2003
Male accessory sex gland infections are considered as potential hazards to male fertility. Various pathophysiological concepts have evolved from experimental and clinical studies that begin to explain the effects of bacteria and immunological events on the function of spermatozoa and sperm motility in particular. Besides direct influences of pathogenic
T, Diemer, P, Huwe, M, Ludwig, E W, Hauck, W, Weidner   +4 more
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Hyperactivated Motility in Sperm

Journal of Andrology, 1996
The functions of hyperactivation may fit together to create the following scenario. Sperm that enter the oviduct bind to the mucosal epithelium. Near the time of ovulation, hyperactivation helps them to detach from the epithelium, escape mucosal pockets, and move through oviductal mucus.
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Sperm Motility, Velocity and Migration

British Journal of Urology, 1990
Summary— 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.
D F, Badenoch, H D, Moore, W V, Holt, P R, Evans, B S, Sidhu, S J, Evans   +5 more
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Sperm Motility Assessment by Videomicrography

Fertility and Sterility, 1981
A 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 ...
D F, Katz, J W, Overstreet
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Bacterial effect on sperm motility

Urology, 1975
Human 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.
G B, del Porto, F C, Derrick, E R, Bannister   +2 more
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