Among them, sperm motility is a very important index, but in the past, inspectors always made subjective judgments based on the results of naked eye observation under the microscope. It is not only influenced by the technical level of inspectors, but also quite subjective.
According to the method stipulated by the World Health Organization, some laboratories record sperm movement in different grades, while others only make a rough evaluation in general, and the records are good, medium and weak. Therefore, semen examination has been at a low level. In 1970s and 1980s, foreign countries successively developed laser light scattering measurement technology and computer image processing automatic analysis system, which made the level of semen examination very accurate and perfect.
According to the test, the distribution peak of normal human sperm movement speed is 36 μ m/s, and its average movement speed is 35 μ m/s, while that of infertile patients is 32 μ m/s, and its average movement speed is 365,438+0 μ m/s, with significant difference between the two groups.
According to clinical statistics, about 20% of male infertility patients are azoospermia, about 30% are oligozoospermia, and about 40% of patients' sperm movement speed is less than 3 1 μ m/s (half of them are less than 28 μ m/s).
Because a considerable number of male infertile patients have normal semen examination, but the sperm motility rate is actually low, we initially think that if a person's average sperm motility rate is less than 28 microns/second, it should be regarded as asthenospermia (that is, poor sperm motility or poor sperm motility).
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