Home>News Center>China
       
 

First frozen egg babies born by May
By Li Jing (China Daily)
Updated: 2004-03-30 00:47

China's first test-tube baby using frozen eggs is expected to be born in mid-May, according to officials with the First Hospital affiliated with Peking University.

And the hospital that conducted the operation is also considering whether to set up an oocyte or egg bank in Beijing.

Li Xiaohong, director of the Reproduction and Genetics Centre at the hospital said the ground-breaking operation included freezing human eggs, thawing them, fertilizing them with sperm, and then implanting the eggs in a woman patient's uterus.

So far, six women have became pregnant through such operations at the hospital, Li said, adding that two of them are set to give birth in May.

One of the two expectant mothers should deliver twins if all goes as planned, the doctor said.

For years, scientists have been able to thaw frozen sperm and, more recently, have reported success at thawing frozen human embryos. But finding a way to freeze and thaw a woman's eggs has been rare.

Less than 100 women around the world have been able to become pregnant by using frozen eggs, said Li.

The problem has been that tiny human eggs are still much larger with much more water present than sperm or embryonic cells.

As a result, there's much more risk of crucial chromosome-laden fibers within the eggs suffering destruction from frozen water crystals.

Li said her centre had a 96 per cent egg survival rate after the thawing-out process, a surprisingly good record compared to the rest of the world. And the thawed eggs enjoy almost the same fertilization rate as fresh ones.

But she admitted the average survival rate may be lower since the technology differs from hospital to hospital and the condition of the eggs can vary from woman to woman.

She said the concept of egg freezing can have far-reaching influence on how and when people choose to become parents, with the technology beneficial to more than just infertile couples.

Young women who have not found their ideal husband or want to spend more time building a career will now be able to set aside eggs and make a decision to have a child years down the line.

Young women diagnosed with cancer might gain an option for having children later in life instead of simply accepting becoming infertile from radiation or chemotherapy treatments.

"The prospect of an egg bank is very bright since it could allow women to preserve their eggs," said Li.

Although the doctor refused to reveal the fee for egg preservation, experts estimate the charge is not likely cheap.

In Argentina, the price for preserving eggs is about US$830 a year per woman, a relatively expensive fee for a middle-income person in a developing country.

Li said the management of eggs is very important for an egg bank since the concept of egg freezing throws new wrinkles into the "right-to-life" debate.

"All the operations need to be done within the scope allowed by laws and regulations," said Li.

Meanwhile, much more study is needed before egg freezing becomes routine, she noted.

The success of using frozen eggs to make embryos is just a preliminary step and a great deal needs to be done to confirm the procedure is effective and safe, said Li.

While no birth defects or chromosomal abnormalities have been detected to date worldwide, it will take time to make certain the process is completely safe, said the doctor.

 
  Today's Top News     Top China News
 

Invasive moth and beetle cause huge losses

 

   
 

"Taiwan election biggest joke in the world"

 

   
 

Al Qaeda spy chief killed in Pakistani raid

 

   
 

'Dead zones' top list of hazards

 

   
 

All 22 herdsmen safe after storm

 

   
 

Paper to review human rights

 

   
  Interpretation of Basic Law in HK's interest
   
  East aims at balanced development
   
  Contract ensures more oil delivery to China
   
  State raises rice prices amid output drop
   
  Taiwan police disperses protesters
   
  Hong Kong targets individual tourists
   
 
  Go to Another Section  
 
 
  Story Tools  
   
  News Talk  
  Are the Chen-Lu shootings a fabricated hoax or an amateurish bungling  
Advertisement
         
主站蜘蛛池模板: 日韩人妻精品一区二区三区视频| 精品国产一区二区三区不卡| 最近更新的2019免费国语电影| 做受视频120秒视频| 色费女人18毛片a级毛片视频| 国产精品久久久久9999| 中文字幕一二三四区2021| 男人j桶进女人p无遮挡免费 | 欧妇女乱妇女乱视频| 国产精品jizz在线观看直播| av无码a在线观看| 小雪把双腿打开给老杨看免费阅读 | 西西人体欧美大胆在线| 天堂资源在线www中文| 一本一本久久a久久精品综合麻豆| 日本69xxxx| 久草热久草视频| 男人一进一出桶女人视频| 啊灬啊灬啊灬快灬别进去| 艳妇乳肉豪妇荡乳AV| 国产国语在线播放视频| 992tv在线| 国产漂亮白嫩美女在线观看| 1000部啪啪未满十八勿入免费| 国产麻豆成av人片在线观看| av色综合网站| 天天操天天干天天干| www884aa| 女人是男人的未来的人| 久久国产免费观看精品3| 最近中文字幕完整视频高清10| 亚洲最大免费视频网| 欧美日韩高清完整版在线观看免费 | 99精品偷自拍| 日本韩国一区二区| 五月天综合网站| 最近在线中文字幕影院网| 亚洲av福利天堂一区二区三| 欧美日韩国产va另类| 亚洲日韩V无码中文字幕| 欧美精品第一页|