Whether it is heavier birth weights, amplified testosterone levels or simple, hair-raising high jinks, boys seem to take an extra toll on the women who gave birth to them.

 
  • 不管是出生时儿子体重较重、睪固酮(男性激素)增加、还是青少年令人寒毛直竖的嬉闹搞怪,男孩似乎都让生育他们的女性付出更高的代价。
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