Ultrasound may damage child's brain

Ultrasound may cause subtle brain damage to unborn children, according to the findings of the largest study on the effect of pre-natal scanning.

Ultrasound may cause subtle brain damage to unborn children, according to the findings of the largest study on the effect of pre-natal scanning.

The research by Swedish scientists found that boys whose mothers had ultrasound scans during pregnancy were more likely to be left handed, recognised as a mild form of brain damage.

The scientists compared almost 7,000 men whose mothers had scans in the 1970s with 170,000 men whose mothers did not. The study found that men whose mothers received scans were more likely than normal to be left handed.

Researchers found the biggest difference in the rate of left handedness was among children born after 1975, when doctors introduced a second scan later in pregnancy. Such men were 32 per cent more likely to be left handed than those who were not scanned.

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