<tt id="6hsgl"><pre id="6hsgl"><pre id="6hsgl"></pre></pre></tt>
          <nav id="6hsgl"><th id="6hsgl"></th></nav>
          国产免费网站看v片元遮挡,一亚洲一区二区中文字幕,波多野结衣一区二区免费视频,天天色综网,久久综合给合久久狠狠狠,男人的天堂av一二三区,午夜福利看片在线观看,亚洲中文字幕在线无码一区二区
          English 中文網 漫畫網 愛新聞iNews 翻譯論壇
          中國網站品牌欄目(頻道)
          當前位置: Language Tips > Special Speed News VOA慢速

          A way to make new eggs in women?

          [ 2012-02-29 14:43]     字號 [] [] []  
          免費訂閱30天China Daily雙語新聞手機報:移動用戶編輯短信CD至106580009009

          A way to make new eggs in women?

          This is the VOA Special English Health Report.

          New research could raise hope for women who are having trouble getting pregnant.

          For years, the thinking has been that women are born with all the eggs their bodies will ever produce. In fact, this has been the thinking not just about humans but all mammals.

          Then, in 2004, a researcher at Massachusetts General Hospital reported a surprising discovery. Jonathan Tilly found that adult female mice could produce new eggs.

          Now, Jonathan Tilly has extended his work and reported another discovery -- this time about human females.

          JONATHAN TILLY: "We've isolated, essentially, the female equivalent of the stem cells that we know exist in men that actively make new sperm. So having these cells now isolated, I think, opens up a lot of opportunities to consider that we simply couldn't fathom before."

          Stem cells are special kinds of cells. Starting inembryos just a few days old, they produce the many different cell types and tissues that form the body. In some adult tissues, stem cells produce replacements for damaged or worn out cells.

          In his new study, Jonathan Tilly and other researchers removed cells from ovaries. Ovaries are the female reproductive organs that produce eggs. The scientists did laboratory tests to make sure they had the right cells that they were looking for. Then they used what are known as culturing methods to grow the cells so they would divide and produce more cells.

          JONATHAN TILLY: "And we could start with perhaps one hundred cells, and over several months' time take those 100 cells and make hundreds of thousands of cells. And interestingly, we noticed that these cells would spontaneously generate immature eggs, all on their own, in these cultures."

          The researchers did not stop there. They wanted to further confirm the ability of these cells to make eggs. They placed some of the cells into human ovary tissue. Then they implanted the tissue under the skin of laboratory mice.

          The studies found that these human cells were -- in Jonathan Tilly's words -- "more than happy to create brand-new human egg cells." He says growing eggs in the lab could improve the chances for women who are having the process known as in vitro fertilization. With IVF, an egg is fertilized with sperm in a laboratory, then placed in the woman'suterus to develop.

          Jonathan Tilly says his work could also lead to fertility treatments that might improve the chances for more traditional fertilization methods.

          JONATHAN TILLY: "We can also think about, perhaps, targeting these cells in the ovaries with hormones that these cells like, and thereby increasing their activity and perhaps increasing the size of the egg cell reserve in the ovary, when it would be desirable to do so."

          His paper on making new human eggs from stem cells was published online this week by the journal Nature Medicine. Some experts raised questions about his earlier work with mice. Some are not so sure about this study either, until other researchers can reproduce the findings.

          And that's the VOA Special English Health Report. I'm Jim Tedder.

          fathom: 看穿;徹底了解

          embryos: 胚胎;晶胚

          ovaries: 卵巢,子房

          uterus: 子宮

          Related Stories:

          Wi-Fi connections may damage sperm

          日本培育出人工精子 沒男性也能生育后代

          突尼斯母親懷12胞胎再破紀錄

          Octuplets mom 'obsessed with having kids'

          (來源:VOA 編輯:Rosy)

           
          中國日報網英語點津版權說明:凡注明來源為“中國日報網英語點津:XXX(署名)”的原創作品,除與中國日報網簽署英語點津內容授權協議的網站外,其他任何網站或單位未經允許不得非法盜鏈、轉載和使用,違者必究。如需使用,請與010-84883631聯系;凡本網注明“來源:XXX(非英語點津)”的作品,均轉載自其它媒體,目的在于傳播更多信息,其他媒體如需轉載,請與稿件來源方聯系,如產生任何問題與本網無關;本網所發布的歌曲、電影片段,版權歸原作者所有,僅供學習與研究,如果侵權,請提供版權證明,以便盡快刪除。
           

          關注和訂閱

          人氣排行

          翻譯服務

          中國日報網翻譯工作室

          我們提供:媒體、文化、財經法律等專業領域的中英互譯服務
          電話:010-84883468
          郵件:translate@chinadaily.com.cn
           
           
          主站蜘蛛池模板: 国产成人亚洲老熟女精品| 人妻在线无码一区二区三区| 四虎在线播放亚洲成人| 亚洲国产AV无码综合原创| 色偷偷中文在线天堂中文| 亚洲国产美女精品久久久| 日本国产精品第一页久久| 口爆少妇在线视频免费观看| 日本精品不卡一二三区| 亚洲sm另类一区二区三区| 亚洲欧美综合中文| 国产精品一区高清在线观看| 精品无码一区二区三区的天堂 | 人人妻人人添人人爽日韩欧美 | 99久久免费精品色老| 少妇无码吹潮| 国产v亚洲v天堂a无| 国产精品大白天新婚身材| 在线观看亚洲AV日韩A∨| 精品久久精品久久精品久久| 亚洲综合av一区二区三区| 久久精品有码中文字幕1| 人妻少妇精品无码专区二区 | 久久久久久亚洲精品| 成人午夜在线观看日韩| av无码东京热亚洲男人的天堂| 国产成人亚洲综合无码18禁h| 日韩精品亚洲 国产| 国产乱人伦AV在线A| 久久精品国产亚洲av热一区| 国模精品二区| 中文字幕人妻精品在线| 少妇人妻偷人精品视蜜桃 | 中文字幕人妻中出制服诱惑| 无码高潮爽到爆的喷水视频app| 亚洲一精品一区二区三区| 国产精品视频亚洲二区| 久久综合色之久久综合色| 99久久免费精品国产色| 欧美成人www免费全部网站| 麻豆一区二区三区蜜桃免费|