越南发现同母异父双胞胎
<p><span word="A">A</span> <span word="pair">pair</span> <span word="of">of</span> <span word="Vietnamese">Vietnamese</span> <span word="fraternal">fraternal</span> <span word="twins">twins</span> <span word="have">have</span> <span word="been">been</span> <span word="confirmed">confirmed</span> <span word="to">to</span> <span word="have">have</span> <span word="different">different</span> <span word="fathers">fathers</span>, <span word="a">a</span> <span word="local">local</span> <span word="genetic">genetic</span> <span word="association">association</span> <span word="has">has</span> <span word="told">told</span> <span word="the">the</span> <span word="BBC">BBC</span>. <span word="The">The</span> <span word="twins">twins</span> <span word="had">had</span> <span word="their">their</span> <span word="DNA">DNA</span> <span word="tested">tested</span> <span word="after">after</span> <span word="their">their</span> <span word="family">family</span> <span word="noticed">noticed</span> <span word="they">they</span> <span word="looked">looked</span> <span word="different">different</span>, <span word="said">said</span> <span word="local">local</span> <span word="reports">reports</span>.</p><p>当地一家遗传机构接受<span word="BBC">BBC</span>采访时透露，一对越南的异卵双胞胎已被证实来自不同的父亲。据当地媒体报道，该双胞胎在其家属觉察长相不同后，接受了<span word="DNA">DNA</span>测试。</p><p><span word="The">The</span> <span word="occurrence">occurrence</span>, <span word="known">known</span> <span word="as">as</span> <span word="heteropaternal">heteropaternal</span> <span word="superfecundation">superfecundation</span>, <span word="is">is</span> <span word="rare">rare</span> <span word="with">with</span> <span word="few">few</span> <span word="publicly">publicly</span> <span word="known">known</span> <span word="about">about</span>. <span word="It">It</span> <span word="happens">happens</span> <span word="when">when</span> <span word="a">a</span> <span word="woman">woman</span>'<span word="s">s</span> <span word="eggs">eggs</span> <span word="are">are</span> <span word="fertilised">fertilised</span> <span word="by">by</span> <span word="two">two</span> <span word="men">men</span> <span word="within">within</span> <span word="a">a</span> <span word="short">short</span> <span word="period">period</span> <span word="of">of</span> <span word="time">time</span>.</p><p>发生的这一案例被称为异父超级受精，这是一种鲜为公众所知的罕见案例。这只会发生在女性的一个卵子在短时间内被两名男性的精子受精的情况下。</p><p><span word="Professor">Professor</span> <span word="Le">Le</span> <span word="Dinh">Dinh</span> <span word="Luong">Luong</span>, <span word="president">president</span> <span word="of">of</span> <span word="the">the</span> <span word="Hanoi">Hanoi</span>-<span word="based">based</span> <span word="Vietnam">Vietnam</span> <span word="Genetic">Genetic</span> <span word="Association">Association</span> <span word="which">which</span> <span word="did">did</span> <span word="the">the</span> <span word="DNA">DNA</span> <span word="testing">testing</span>, <span word="said">said</span> <span word="the">the</span> <span word="results">results</span> <span word="were">were</span> "100% <span word="correct">correct</span>" <span word="in">in</span> <span word="what">what</span> <span word="he">he</span> <span word="called">called</span> "<span word="an">an</span> <span word="extremely">extremely</span> <span word="rare">rare</span> <span word="case">case</span>".</p><p>总部位于河内的越南遗传学会负责了本次<span word="DNA">DNA</span>测试，其董事长<span word="Le">Le</span> <span word="Dinh">Dinh</span> <span word="Luong">Luong</span>教授表示，这个“极为罕见的案例”的测试结果“百分百正确”。</p>
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