The study, experts say, suggests that men’s bodies evolved hormonal systems that helped them commit to their families once children were born.

在研究中，专家们表示，确定那个男性的身体进化的激素系统，当他们的孩子降临人世的时候，能有助于他们将自己置身于他们的家庭成员之中。

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The study, experts say, suggests that men's bodies evolved hormonal systems that helped them commit to their families once children were born.

在研究中，专家们表示，确定那个男性的身体进化的激素系统，当他们的孩子降临人世的时候，能有助于他们将自己置身于他们的家庭成员之中。

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Objective To study hormonal level changes of rats after spinal cord injury.

目的研究大鼠脊髓损伤后生殖激素水平的改变。

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However the study does tally with several others, some of which have found that hormonal changes brought on by a lack of sleep can lead to an increased appetite.

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She has chosen 51 genes to study, including those involved in the body's responses to stress and infection, in hormonal changes related to pregnancy, and in ways in which the body handles a wide variety of environmental toxins.

BBC: Gene clue to pregnancy riddle