New York: Couples trying to conceive a baby, should try during winter and spring, as human sperm seem to be healthier -- with faster swimming speeds and fewer abnormalities -- during those times, a new study has found.Autumn is the time of year most associated with bumper crops of new babies, and according to an Israeli study there may be a scientific reason for it.Based on samples from more than 6,000 men treated for infertility, researchers found sperm in greater numbers, with faster swimming speeds and fewer abnormalities in semen made during the winter, with a steady decline in quality from spring onward."The winter and spring semen patterns are compatible with increased fecundability and may be a plausible explanation of the peak number of deliveries during the fall," lead researcher Eliahu Levitas from Ben-Gurion University of the Negev in Beer-Sheva wrote.If there is a seasonal pattern, they said, that knowledge may "be of paramount importance, especially in couples with male-related infertility struggling with unsuccessful and prolonged fertility treatments."For the new study, Levitas and his colleagues collected and analyzed 6.455 semen samples from men at their fertility clinic between January 2006 and July 2009.Of those, 4,960 were found to have normal sperm production, and 1,495 had abnormal production, such as low sperm counts.
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