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Israeli scientists studied samples from more than 6,000 men who were being treated for infertility. They found sperm in greater numbers, with faster swimming speeds, and fewer abnormalities, in semen made during the winter. The sperm declined steadily in quality from spring onwards. The researchers say this may explain why there are so many babies born in the autumn.
以色列科學家對6000名以上患有生育方面疾病的男子進行抽樣研究，發現冬季產生的精子在數量和游泳速度方面都優于其它季節，畸形情況也比較少。而自進入夏季，精子質量就開始全面下降。研究人員聲稱，這也是很多小孩在秋季出生的原因。
The reason why sperm appears to be healthier in winter isn't yet clear. One theory is sperm is affected by warn temperatures.
但是，研究人員還并未完全明白冬季精子質量高的原因。一種可能的解釋是較高的溫度對精子會有不利的影響。
In animal studies, seasonal changes in sperm production and fertility have been linked to factors ranging from temperature, to length of daylight exposure and hormone variations.
研究人員在對動物的研究中就發現溫度變化和精子的產生與生育能力大有關系。當然季節規律對于那些精子排出規律反常的男子來說不會有什么影響。
Writing in the American Journal of Obstetrics & Gynaecology, the researchers said that if there is a seasonal pattern, that knowledge may ‘be of paramount importance, especially in couples with male-related infertility struggling with unsuccessful and prolonged fertility treatments.’
之前有研究證明當今世界，男性的精子數量正在日益下降。在不清楚確切原因的情況下，人們普遍認為是現代社會久坐不動的生活方式影響了精子質量。
