伦敦经济学院的金泽聪博士分析了一项对英国1.7万人进行的终身跟踪调查数据，调查对象都是1958年3月在英国出生的。这些人在7岁时，他们的老师对他们的吸引力做了评估。在他们45岁时，研究者向其询问了他们所生的孩子的性别。

　Those rated as attractive were equally likely to have a son or daughter as their first child – but the unattractive sorts were more likely to have a son.

　　那些被评为“有魅力的”人头胎生男生女的机会均等，但那些“没有魅力的”人生儿子的几率更大。

Put another way, the beautiful women were more likely to have daughters than those who were less blessed in the looks department, the journal Reproductive Sciences will report.

　　换句话说，根据《生殖科学》杂志的报道，漂亮的女人比那些长相平平的女人更容易生女孩。

　　A previous study of 2,000 Americans suggested that women are becoming more beautiful over the generations because attractive women have more children than plain ones – and a higher proportion of their offspring are girls.

　　先前一项涵盖了2000名美国人的研究显示，随着人类一代又一代的更替，女性会变得越来越漂亮，因为漂亮女人比长相普通的女人生的孩子更多，而且在她们的后代中女孩占的比例更大。

　　Dr Kanazawa believes that parents tend to produce children who benefit from their own attributes. Beauty, he says, is of more benefit to a woman than a man, and so it pays for attractive women to have daughters.

　　金泽博士认为，父母通常会生出能受益于自身基因的孩子。他说，美貌对于女性而言比对于男性好处更多，因此漂亮女人生女儿是值得的。

　　But couples blessed with strength and aggression rather than looks are better offhavingboys, as these characteristics are of more use to males.

　　比起长相好的夫妇，那些体力更强、更有进取心的夫妇更容易生儿子，因为这些特质对男性更有用。