Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Prenatal sonography has no effect on the intellectual capacity of the developing child

13.04.2005


Scientists carrying out a major epidemiological study at Karolinska Institutet and Uppsala University have discovered that there is no clear correlation between routine ultrasonic scans and intellectual impairment.



“Fears have been expressed that sonography can lead to diminished intellectual capacity,” explains Helle Kieler, research scientist at Karolinska Institutet.

Previous epidemiological studies have shown that young men who had been exposed to in utero ultrasonic scans are more likely than other young men to be left handed; and that there is a correlation between left-handedness and reduced intellectual capacity in children born after a complicated pregnancy.


The new study, which is to be published on 13 April in the scientific journal Epidemiology, is based on data from approximately 180,000 boys born in the 1970s, when routine ultrasonic examinations of foetal development were first introduced in Sweden. Almost 20 years later, the young men were given intelligence tests on signing up for their military service. When researchers compared the boys who had been scanned with those that had not, it transpired that intellectual capacity was lower in those who were exposed to ultrasound in during gestation. The differences, however, were small and other influences on the results could not be ruled out.

To control for such (unquantified) factors, the scientists then conducted a smaller-scale analysis of brothers. This enabled them to confirm that there was nothing to suggest that the brother who had been exposed to in utero ultrasonic radiation was intellectually inferior to the one who had not.

“The results are reassuring in terms of the risk that routine prenatal sonography has lasting effects on the development of the foetal brain,” says Ms Kieler. “It is important to remember, however, that the study reflects the effects of how ultrasound was used in the 1970s. Scanning procedures have changed since then, and children born today have generally been exposed to more ultrasonic radiation than those included in the study.”

Sabina Bossi | alfa
Further information:
http://www.ki.se

More articles from Health and Medicine:

nachricht Organ-on-a-chip mimics heart's biomechanical properties
23.02.2017 | Vanderbilt University

nachricht Researchers identify cause of hereditary skeletal muscle disorder
22.02.2017 | Klinikum der Universität München

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Stingless bees have their nests protected by soldiers

24.02.2017 | Life Sciences

New risk factors for anxiety disorders

24.02.2017 | Life Sciences

MWC 2017: 5G Capital Berlin

24.02.2017 | Trade Fair News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>