New discoveries about the

Human sperm are "athletes" who swim profusely with the ability to swim upstream strongly to reach their ultimate goal - eggs, according to a new study.

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Scientists from the Massachusetts Institute of Technology (USA) observed that, instead of swimming in a straight line, "sperms" shifted spirally to reach the lowest flow. They also found that the sperm may have teamed up together, instead of competing, to reach the final destination.

These conclusions were drawn after scientists conducted research on sperm reaching eggs.

As we all know, out of the hundreds of millions of "breeds" that begin the journey through the fallopian tubes, only a few of them finish. These "sperms" not only have to swim in the right direction for nearly 1,000 times their body length, but also have to deal with a multitude of different chemicals along the way.

To clarify how sperm responds to this challenge, Professor Jorn Dunkel and colleagues at the Massachusetts Institute of Technology have established a "mini raid of soldiers" in the laboratory, using a series of tubes. Lead different sizes. The results revealed, at certain flow rates, the sperm were able to swim upstream effectively for many minutes.

The sperm tend to avoid the center of the duct, where the flow is fastest, and wiggle along the conduit walls in spiral motion. The researchers suspect they also do the same thing in the fallopian tube when swimming towards the egg. In addition, "sperms" have regrouped into plaques, which can swim faster and increase fertility.

Professor Dunkel explains: " The popular concept is that, among competing sperm, in which the most healthy sperm will approach the first egg. However, our recent studies and others show that the actual breeds always gather on the surface of a duct, which may be their cooperation, to swim faster. "