sperm morphology

Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to sperm morphology: sperm count, sperm motility

sperm morphology

A parameter assessed in semen analysis: according to WHO criteria, a sample is regarded as normal if 4% or more of the sperm are morphologically normal.


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 ?
Sperm morphology was assessed based on the results of the microscopic analysis of preparations made from the samples of all collected ejaculates.
More recent studies have shown increased TNF-[alpha] in semen to be associated with reduced sperm count, sperm motility, and sperm morphology (3637).
These exploratory findings suggest some deleterious differences in sperm morphology (e.
com/health/2014/06/05/marijuana-use-may-affect-size-and-shape-men-sperm/) Fox News notes that using the guidelines on sperm morphology issued by the World Health Organization, a majority of the participants, 1,652 men, were able to produce "normal" samples of sperm - meaning over 4 percent of their sperm was the right shape size.
Sperm morphology (normal/abnormal) expressed as percentage was assessed under oil (Immersion oil) at 100x magnification of microscope using ocular micrometer (ocular micrometer should be calibrated with stage micrometer to measure the exact size).
The key parameters of semen analysis are semen volume, sperm concentration, sperm motility, and sperm morphology (6).
Effects of dietary zinc depletion on seminal volume and zinc loss, serum testosterone concentrations, and sperm morphology in young men.
On a positive note, higher intake of omega 3 polyunsaturated fats was related to a more favorable sperm morphology.
In the study summary posted in the online March 28 issue of Andrologia, researchers said, "Significant difference was observed in sperm morphology between the two groups.
They provide background and the steps of procedures, with information on quality control, presentation of results, analysis of sperm morphology, and techniques for the use of computer-aided analysis and sperm functional assessment, as well as the biochemical evaluation of seminal plasma and sperm and the detection of anti-sperm antibodies.
I reviewed the literature, and did not find any reports on exercise affecting sperm morphology and mobility, however.
But polyunsaturated fat - those seen in fish primarily - was associated with improved sperm morphology and motility.