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.以色列科学家对6000名以上患上生育方面疾病的男子展开取样研究，找到冬季产生的精子在数量和游泳速度方面都高于其它季节，畸形情况也较为较少。而自转入夏季，精子质量就开始全面上升。研究人员声称，这也是很多小孩在秋季出生于的原因。

The reason why sperm appears to be healthier in winter isnt yet clear. One theory is sperm is affected by warn temperatures.但是，研究人员还未几乎明白冬季精子质量低的原因。一种有可能的说明是较高的温度对精子不会有有利的影响。

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.研究人员在对动物的研究中就找到温度变化和精子的产生与生育能力大有关系。当然季节规律对于那些精子排泄规律异常的男子来说会有什么影响。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.’之前有研究证明当今世界，男性的精子数量正在日益上升。在不确切清楚原因的情况下，人们普遍认为是现代社会久坐一动的生活方式影响了精子质量。

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