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Human semen, sperm cells (spermatozoa) under the microscope at 400x in 2019 part 1

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Human semen, sperm cells (spermatozoa) under the microscope at 400x in 2019 part 1

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<a href="https://video.fc2.com/content/20190830wJWrwFuM/&tk=" title="Human semen, sperm cells (spermatozoa) under the microscope at 400x in 2019 part 1" rel="nofollow">Human semen, sperm cells (spermatozoa) under the microscope at 400x in 2019 part 1</a>

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