<Ul> <Li> A meta - analysis of several ultrasonography studies published in 2000 found no statistically significant harmful effects from ultrasonography, but mentioned that there was a lack of data on long - term substantive outcomes such as neurodevelopment . </Li> <Li> A study at the Yale School of Medicine published in 2006 found a small but significant correlation between prolonged and frequent use of ultrasound and abnormal neuronal migration in mice . </Li> <Li> A study performed in Sweden in 2001 has shown that subtle effects of neurological damage linked to ultrasound were implicated by an increased incidence in left - handedness in boys (a marker for brain problems when not hereditary) and speech delays . <Ul> <Li> The above findings, however, were not confirmed in a later follow - up study . </Li> <Li> A later study, however, performed on a larger sample of 8865 children, has established a statistically significant, albeit weak association of ultrasonography exposure and being non-right handed later in life . (See Handedness #Ultrasound). </Li> </Ul> </Li> </Ul> <Li> A meta - analysis of several ultrasonography studies published in 2000 found no statistically significant harmful effects from ultrasonography, but mentioned that there was a lack of data on long - term substantive outcomes such as neurodevelopment . </Li> <Li> A study at the Yale School of Medicine published in 2006 found a small but significant correlation between prolonged and frequent use of ultrasound and abnormal neuronal migration in mice . </Li> <Li> A study performed in Sweden in 2001 has shown that subtle effects of neurological damage linked to ultrasound were implicated by an increased incidence in left - handedness in boys (a marker for brain problems when not hereditary) and speech delays . <Ul> <Li> The above findings, however, were not confirmed in a later follow - up study . </Li> <Li> A later study, however, performed on a larger sample of 8865 children, has established a statistically significant, albeit weak association of ultrasonography exposure and being non-right handed later in life . (See Handedness #Ultrasound). </Li> </Ul> </Li>

Ultrasound is used in medicine both for diagnostic imaging