男性41岁后做爸爸难度陡增
<p><span word="Male">Male</span> <span word="fertility">fertility</span> <span word="declines">declines</span> <span word="with">with</span> <span word="age">age</span> – <span word="with">with</span> <span word="even">even</span> <span word="a">a</span> <span word="year">year</span> <span word="making">making</span> <span word="a">a</span> <span word="difference">difference</span>, <span word="researchers">researchers</span> <span word="have">have</span> <span word="warned">warned</span>.</p><p>据英国《每日邮报》10月20日报道，研究警示男性的生育力随着年龄的增长而下滑，甚至每年都有较大差别。</p><p><span word="They">They</span> <span word="say">say</span> <span word="that">that</span> <span word="after">after</span> <span word="the">the</span> <span word="age">age</span> <span word="of">of</span> 41, <span word="a">a</span> <span word="man">man</span>’<span word="s">s</span> <span word="odds">odds</span> <span word="of">of</span> <span word="fathering">fathering</span> <span word="a">a</span> <span word="child">child</span> <span word="decline">decline</span> <span word="rapidly">rapidly</span>. <span word="And">And</span> <span word="after">after</span> 45, <span word="those">those</span> <span word="who">who</span> <span word="haven">haven</span>’<span word="t">t</span> <span word="started">started</span> <span word="a">a</span> <span word="family">family</span> <span word="and">and</span> <span word="want">want</span> <span word="one">one</span> <span word="should">should</span> <span word="start">start</span> <span word="doing">doing</span> <span word="something">something</span> <span word="about">about</span> <span word="it">it</span>.</p><p>研究人员称，男性在41岁之后做父亲的几率会迅速降低。而在45岁以后，那些仍处于单身但还想要组建家庭的男性就应该为此费点功夫了。</p><p><span word="The">The</span> <span word="warning">warning</span> <span word="comes">comes</span> <span word="from">from</span> <span word="a">a</span> <span word="study">study</span> <span word="of">of</span> <span word="IVF">IVF</span> <span word="patients">patients</span> <span word="in">in</span> <span word="which">which</span> <span word="the">the</span> <span word="man">man</span>’<span word="s">s</span> <span word="sperm">sperm</span> <span word="fertilised">fertilised</span> <span word="an">an</span> <span word="egg">egg</span> <span word="from">from</span> <span word="a">a</span> <span word="donor">donor</span>.</p><p>该警告来自于针对接受试管受精病人的一项研究。在这些病人体内，男子的精子与受捐的卵子进行了配对。</p><p><span word="In">In</span> <span word="the">the</span> <span word="context">context</span> <span word="of">of</span> <span word="the">the</span> <span word="study">study</span>, <span word="the">the</span> <span word="use">use</span> <span word="of">of</span> <span word="donor">donor</span> <span word="eggs">eggs</span> <span word="allowed">allowed</span> <span word="the">the</span> <span word="researchers">researchers</span> <span word="to">to</span> <span word="separate">separate</span> <span word="out">out</span> <span word="the">the</span> <span word="effect">effect</span> <span word="of">of</span> <span word="the">the</span> <span word="man">man</span>’<span word="s">s</span> <span word="age">age</span> <span word="from">from</span> <span word="that">that</span> <span word="of">of</span> <span word="the">the</span> <span word="woman">woman</span>’<span word="s">s</span>.</p><p>在这种研究背景下，使用捐赠的卵子可以让研究人员分辨出(受精卵的质量)是受男人年龄影响还是源自女方因素。</p><p><span word="The">The</span> <span word="donor">donor</span> <span word="eggs">eggs</span> <span word="all">all</span> <span word="came">came</span> <span word="from">from</span> <span word="young">young</span>, <span word="healthy">healthy</span> <span word="women">women</span> <span word="and">and</span> <span word="so">so</span> <span word="any">any</span> <span word="differences">differences</span> <span word="in">in</span> <span word="pregnancy">pregnancy</span> <span word="rate">rate</span> <span word="must">must</span> <span word="be">be</span> <span word="due">due</span> <span word="to">to</span> <span word="the">the</span> <span word="sperm">sperm</span>.</p><p>卵子捐赠者均为年轻健康的女性，所以任何受孕几率上的差别一定是源于精子。</p>
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