Laser measurement of the motility of bull spermatozoa in an egg-yolk diluent

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Abstract
An objective method of assessing bull sperm motility [after freezing] by specifying the mean swimming speed and number of motile spermatozoa in a sample, is described. Laser light was conducted into diluted semen samples using a fiber-optic Doppler anemometer (FODA). The signal correlation of the back-scattered laser light was modelled using least squares computer curve fitting of the resulting data. Agreement was found between the mean swimming speeds obtained and those measured using time-lapse photography.