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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 published in the journal Science Advances, Meisam Zaferani, Gianpiero Palermo and Alireza Abbaspourrad describe their study of human and bull sperm swimming in artificial devices and what they found.
Medical researchers have long suspected that there are features of the female anatomy that favor faster-swimming sperm—though there is no evidence that faster swimming sperm offer any genetic advantages over their slower colleagues. Still, scientists would like to know if this is the case, because it might provide hope to men who wish to conceive but have slow swimmers (low motility).
Success - Rates - Versus - Sperm - Researchers
To learn more about the success rates of slow- versus fast-swimming sperm, the researchers built a device to mimic some of the more intricate parts of the female reproductive tract. They note that similar studies in the past have tested sperm swimming in ways similar to testing human swimming—by testing them in a straight-line course from beginning to end. The researchers note that the female...
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