奥地利研究人员发现,在冬季出生的男孩中,左撇子比例相对较大。对约1.3万名奥地利人和德国人的调查发现,在男性左撇子中,2月至10月出生的比例为8.2%,而11月至翌年1月出生的比例则达到10.5%。上世纪80年代有人提出一种理论认为,睾丸激素水平偏高会使胎儿的左脑发育减慢,所以左撇子通常右脑比较发达。研究人员分析说,睾丸激素水平的高低与孕妇怀孕期间的日照时间长 Austrian researchers found that in winter, the proportion of left-handed boys is relatively large. A survey of 13,000 Austrians and Germans found that among male left-handers, the birth rate was 8.2% in February-October and 10.5% in November-January of the following year. 80s of last century was put forward a theory that the high testosterone levels will make the fetus slowed the development of the left brain, so the left-handed is usually more developed right brain. Researchers analyzed that the level of testosterone and pregnant women during pregnancy sunshine long time