sperm motility

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Related to sperm motility: sperm count, sperm morphology

sperm motility

A parameter assessed in semen analysis that consists of the ability of sperm to swim in a forward direction. Per the WHO, 60% is the lower reference limit for motility, assuming a lower limit of 20 million sperm cells per milliliter.


the male germ cell. See also spermatozoon.

sperm agglutinins
anti-sperm antibodies of the IgG class occur as autoantibodies in dogs infected with Brucella canis.
sperm capacitation
acquisition of the capacity to penetrate an ovum, not present at the time of delivery of the spermatozoon, and which requires a period of incubation in the female tract. It involves increased metabolic activity and motility and the removal of a chemical decapacitation factor from the spermatozoon. Capacitation must take place for the acrosome reaction to occur.
sperm concentration
a sperm count as measured in a hemocytometer; an indication of the health of the relevant testicles and a guide to the prospective fertility of the ejaculate and the donor.
sperm live-dead ratio
an indicator of the viability of the ejaculate as expressed in a slide count of a specially stained smear of the semen in which the dead and live sperm can be distinguished because of their differential staining.
sperm morphology
the normal anatomical structure of the spermatozoon. Abnormality of the structure of individual spermatozoa is used as a guide to the location and nature of the disease causing reduced reproductive efficiency.
Enlarge picture
Morphology of normal and abnormal canine spermatozoa. By permission from Nelson RW, Couto CG, Small Animal Internal Medicine, Mosby, 2003
sperm motility
the percentage of spermatozoa moving actively forward. Assessed under the microscope (400 × magnification) or by computerized imaging. See also wave motion; used to predict the probable fertility of the ejaculate.
sperm motility index
half the sum of the sample's sperm percentage motility + sperm progressive motility.
sperm penetration assay
see ovum penetration assay.
sperm stone
hard bodies composed of inspissated masses of spermatozoa found in dilated remnants of epididymal ducts and produced by chronic epididymitis.
sperm transport
within both male and female reproductive tracts some movement forward results from the movements of the spermatozoa but most progress is the result of peristaltic movements by the tubular organs in which the spermatozoa find themselves at the time.
References in periodicals archive ?
Decreased individual sperm motility in winter was also found by Singh et al.
In stallion, dietary omega-3 fatty acids also reduced sperm motility and morphology in raw and frozen-thawed semen (Grady et al.
Mammalian sperm membranes are sensitive to lipid per oxidation and contain large amounts of unsaturated fatty acids, resulting from oxidative stress, and reduce sperm motility and viability (Saleh & Agarwal, 2002; Ozatik et al.
The sperm motility was measured by putting small drop of extended semen on warmed slide.
Schlesinger et al also reported that sperm motility statistically improved after varicocelectomy in 5 of 12 studies.
It is known that several factors affect sperm motility, such as pH, temperature, ions, osmolality, and ovarian fluid (OF) [22].
Immediately after collection, semen samples were evaluated for volume, mass activity, sperm motility percentage, sperm viability, and sperm concentration.
This technique is based on initial sperm motility and the surface of cell pellet.
For experiment 2, one-way ANOVA was used to compare the effect of different concentrations of LHRHa on sperm density and a two-way ANOVA was used to compare the effects of different LHRHa concentrations and time on sperm motility.
The slide was covered with a coverslip and examined under the microscope using a 40 x objective for sperm motility.
This buffer was selected as the medium for sperm motility assessment because it mimics the natural properties of mucus in vivo (22).