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

  Home>News Center>World
         
 

Babies show signs of crying in the womb
(Reuters)
Updated: 2005-09-10 10:48

An infant's first cry may occur not in the delivery room, but in the womb, researchers have found.

With the help of video-recorded ultrasound images, the investigators found that a group of third-trimester fetuses showed evidence of "crying behavior" in response to a low-decibel noise played on the mother's abdomen.

Fetuses showed a "startle" response to the noise, along with deep inhalations and exhalations, an open mouth and a "quivering" chin -- all signs of crying.

The behavior, seen in 11 fetuses, began as early as the 28th week of pregnancy.

It was only by chance that the researchers made their observations, said study co-author Dr. Ed Mitchell of the University in Auckland in New Zealand.

The ultrasounds and noise stimulation were performed as part of research looking into the effects of maternal smoking and cocaine use during pregnancy. At first, the researchers thought the fetal responses they saw might be seizures, Mitchell told Reuters Health.

But when they took a closer look at the video recordings, they realized the fetuses' behavior was analogous to an infant's crying.

It's not surprising that fetuses this age would show such behavior, Mitchell said, since premature infants born even earlier than the 28th week of pregnancy can cry.

"But it had never been observed or recognized for what it is," he said of the fetal crying.

Mitchell and his colleagues report their findings in the Archives of Disease in Childhood: Fetal and Neonatal Edition.

The researchers first noted the crying behavior in an ultrasound of a 33-week-old fetus. When the stimulus -- noise and vibration akin to a rumbling stomach -- was placed on the mother's abdomen, the fetus "startled" and turned its head. That was followed by heavy breaths, jaw opening and chin quivering, according to the researchers.

Subsequent ultrasounds found similar behavior in 10 fetuses, all 28 weeks old and up, that lasted for 15 to 20 seconds after the noise exposure.

"This phenomenon," the researchers write, "suggests a prenatal origin of crying."

The findings have developmental implications, according to Mitchell and his colleagues. To "cry," they note, the fetus would need not only the movement capability, but also the necessary sensory and brain development to process the offending sound and recognize it as something negative.

In a recent, controversial study, researchers at the University of California, San Francisco concluded that fetuses are unlikely to feel pain before the 29th week of pregnancy. It's believed, Mitchell noted, that the "pain pathways" in the brain begin to develop between weeks 23 and 30.



Post-Katrina New Orleans
12th APEC Finance Ministers Meeting
Evacuation continues in New Orleans
 
  Today's Top News     Top World News
 

China, Canada to build strategic partnership

 

   
 

China's diplomacy enters golden age

 

   
 

China banks target public listings in 2006

 

   
 

Bats may have been source of SARS - study

 

   
 

Fireworks ban goes up in smoke in Beijing

 

   
 

Bush approval rating dips below 40%

 

   
  Katrina costs could approach those of wars
   
  Japan's PM heading for win in Sunday poll
   
  Kuwait, Iraq in contact over Saddam war crimes
   
  Iraq, US move against rebel stronghold
   
  Baghdad airport shuttered over pay dispute
   
  Bush's approval rating dips below 40 pct
   
 
  Go to Another Section  
 
 
  Story Tools  
   
  News Talk  
  Are the Republicans exploiting the memory of 9/11?  
Advertisement
         
主站蜘蛛池模板: 亚洲欧美日韩久久精品第一区 | 91精品综合久久久久m3u8 | 国产欧美一区二区三区在线看 | 成人免费观看国产高清 | 欧洲色老头 | 亚洲成人在线免费 | 交videos人妖 | 亚洲精品国产精品精 | 夜色邦合成福利网站 | 国产一区二区三区亚洲欧美 | 欧美成人a级在线视频 | 韩国一级黄色毛片 | 久久久久久一品道精品免费看 | 日韩欧美一区二区三区在线观看 | 日韩一级特黄 | 日本加勒比系列 | 日本免费网站视频www区 | a级毛片视频免费观看 | 二区在线观看 | 亚洲精品久久9热 | 欧美 另类 精品一区视频 | 国产三级在线观看免费 | 中国胖女人一级毛片aaaaa | 美女张开腿给人网站 | 久久久久9999 | 日韩欧美一区二区三区免费看 | 国产成人在线播放 | 国产成人精品亚洲777图片 | 免费视频 久久久 | 国产亚洲欧美日韩国产片 | 免费观看a视频 | 精品免费久久久久欧美亚一区 | 成人看片在线观看免费 | 国产一级大片在线观看 | 午夜精品视频在线观看美女 | videos欧美丰满肥婆 | 男女视频在线免费观看 | 成 人色 网 站 欧美大片在线观看 | 亚洲一区中文 | 亚洲精品国产成人 | 香蕉视频黄在线观看 |