久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

 
 
 

A way to make new eggs in women?

2012-02-29 14:43

 

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(chuàng)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010-84883561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(fā)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?zhí)峁┌鏅嘧C明,以便盡快刪除。

中國日報網雙語新聞

掃描左側二維碼

添加Chinadaily_Mobile
你想看的我們這兒都有!

中國日報雙語手機報

點擊左側圖標查看訂閱方式

中國首份雙語手機報
學英語看資訊一個都不能少!

關注和訂閱

本文相關閱讀
人氣排行
搜熱詞
 
 
精華欄目
 

閱讀

詞匯

視聽

翻譯

口語

合作

 

關于我們 | 聯系方式 | 招聘信息

Copyright by chinadaily.com.cn. All rights reserved. None of this material may be used for any commercial or public use. Reproduction in whole or in part without permission is prohibited. 版權聲明:本網站所刊登的中國日報網英語點津內容,版權屬中國日報網所有,未經協議授權,禁止下載使用。 歡迎愿意與本網站合作的單位或個人與我們聯系。

電話:8610-84883645

傳真:8610-84883500

Email: languagetips@chinadaily.com.cn

主站蜘蛛池模板: 欧美成人爽毛片在线视频 | 999成人国产精品 | 日本三级欧美三级人妇英文 | 五月六月伊人狠狠丁香网 | 看国产一级毛片 | 2020精品极品国产色在线观看 | 国产亚洲欧美日韩在线看片 | 亚洲欧美成人综合在线 | 97影院理论在线观看 | 国产毛片网站 | 日本在线观看一级高清片 | 亚洲欧美日韩中文字幕在线一区 | 亚洲综合免费 | 美女视频永久黄网站在线观看 | 日韩欧美一区二区三区不卡在线 | 国产成人高清亚洲一区久久 | 美女网站色免费 | 亚洲国产精品a在线 | 亚洲第一视频网站 | 在线观看国产欧美 | 18在线观看国内精品视频 | 黄在线观看网站 | 九九视频高清视频免费观看 | 久久国内免费视频 | 国产精品久久大陆 | 日a在线| 精品色综合| 在线观看视频中文字幕 | 亚洲美女色成人综合 | 国产一区二区在线观看免费 | 成人区精品一区二区不卡亚洲 | 久久香蕉国产线看观看式 | 成人免费午夜视频 | 视频一区二区在线 | 欧美成人精品不卡视频在线观看 | 成人黄色免费观看 | 成人在线视频免费看 | 99国产精品久久久久久久成人热 | 欧美成人手机视频免费播放 | 在线观看亚洲视频 | 日日噜噜噜夜夜爽爽狠狠69 |