Study suggests female reproductive tract may have evolved to favor faster swimming sperm

When it comes to sperm, only the fiercest swimmers can wriggle past the bottlenecks of the female reproductive tract, new research shows. The study could help one day improve tests for male fertility. But, in the meantime, it brings us delightful footage of sperm desperately, fruitlessly swimming into a fake fallopian tube. Sorry, little guys. With a single ejaculate, 100 million sperm can swim up the female reproductive tract — and the theory goes that only solid swimmers can make it to the finish line: the egg. But for years, laboratory sperm have only had to endure simple obstacle courses. That isn’t actually a great analog for the twists and turns of the female reproductive tract. There are bottlenecks, for example, that change how... Continue reading…

Study suggests female reproductive tract may have evolved to favor faster swimming sperm

A trio of researchers with Cornell University and Weill Cornell Medicine has found evidence that the female reproductive tract may have evolved to favor faster-swimming sperm. In their paper ...

Thu 14 Feb 19 from Phys.org

Watch these sperm wriggle up a model reproductive tract

When it comes to sperm, only the fiercest swimmers can wriggle past the bottlenecks of the female reproductive tract, new research shows. The study could help one day improve tests ...

Wed 13 Feb 19 from The Verge

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