怀孕会让人大脑缩水？一孕傻三年！
<p><span word="Women">Women</span> <span word="who">who</span> <span word="are">are</span> <span word="pregnant">pregnant</span> <span word="often">often</span> <span word="report">report</span> <span word="feeling">feeling</span> <span word="a">a</span> <span word="little">little</span> <span word="fuzzy">fuzzy</span>, <span word="a">a</span> <span word="little">little</span> <span word="dim">dim</span> <span word="and">and</span> <span word="more">more</span> <span word="forgetful">forgetful</span> <span word="than">than</span> <span word="usual">usual</span>, <span word="but">but</span> <span word="medical">medical</span> <span word="research">research</span> <span word="has">has</span> <span word="produced">produced</span> <span word="mixed">mixed</span> <span word="data">data</span> <span word="to">to</span> <span word="support">support</span> <span word="the">the</span> <span word="so">so</span>-<span word="called">called</span> “<span word="baby">baby</span> <span word="brain">brain</span>” <span word="phenomenon">phenomenon</span>.</p><p>孕妇常会觉得有些迷糊，较怀孕之前健忘不少，而针对这样的“孕傻”现象，医学研究给出了有多重数据支持的解释。</p><p><span word="Now">Now</span> <span word="a">a</span> <span word="study">study</span> <span word="that">that</span> <span word="used">used</span> <span word="functional">functional</span> <span word="magnetic">magnetic</span> <span word="resonance">resonance</span> <span word="imaging">imaging</span> (<span word="fMRI">fMRI</span>) <span word="confirms">confirms</span> <span word="that">that</span> <span word="mothers">mothers</span> <span word="lose">lose</span> <span word="brain">brain</span> <span word="volume">volume</span> <span word="when">when</span> <span word="they">they</span>’<span word="re">re</span> <span word="pregnant">pregnant</span>, <span word="adding">adding</span> <span word="to">to</span> <span word="the">the</span> <span word="debate">debate</span>.</p><p>最近，一项研究借助功能性磁共振成像，证实了孕妇的大脑会缩水，由此引发一场热议。</p><p><span word="The">The</span> <span word="authors">authors</span> <span word="of">of</span> <span word="the">the</span> <span word="new">new</span> <span word="study">study</span>, <span word="which">which</span> <span word="was">was</span> <span word="published">published</span> <span word="in">in</span> <span word="Nature">Nature</span> <span word="Neuroscience">Neuroscience</span>, <span word="suspect">suspect</span> <span word="the">the</span> <span word="reductions">reductions</span> <span word="they">they</span>’<span word="ve">ve</span> <span word="detected">detected</span> <span word="may">may</span> <span word="be">be</span> <span word="a">a</span> <span word="side">side</span>-<span word="effect">effect</span> <span word="of">of</span> “<span word="synaptic">synaptic</span> <span word="pruning">pruning</span>,” <span word="which">which</span> <span word="also">also</span> <span word="happens">happens</span> <span word="to">to</span> <span word="humans">humans</span> <span word="at">at</span> <span word="age">age</span> <span word="three">three</span> <span word="and">and</span> <span word="again">again</span> <span word="during">during</span> <span word="adolescence">adolescence</span>.</p><p>这项全新的研究被刊登在《自然神经学》杂志上，其研究团队猜想该现象是由“神经元剪切”导致的副作用 — 一般来说，人类会在三岁时经历第一次“神经元剪切”，怀孕时经历第二次。</p>
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