Infertility affects about one in six couples, and male factors account for roughly half of all cases-often because sperm don't swim well. Researchers from the University of Osaka uncovered a key ...

A groundbreaking study led by researchers at the University of Colorado Anschutz Medical Campus reveals that stress-induced changes in sperm motility occur after a stressful event, rather than during ...

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Aug. 9 (UPI) --Using a computer simulation of the stomach, researchers at Johns Hopkins University have found that changes in body posture may have a significant effect on the emptying rate of a ...