What research has been carried out to link frequent Ultrasound
scanning during late pregnancy with conditions such as Dyslexia &
Dyspraxia?  Are boys are at greater risk?  Some research may
have been carried out in Sweden and may also have had links with high
incidence of left handedness.

Hello hils-ga,


Below are several abstracts summarizing research efforts on this
subject. I found them by searching PubMed, a medical database produced
by the National Library of Medicine.

It appear as as though most of the research has been generated in
Norway. It also appears as though a link between ultrasound and
dyslexia has not yet been established.Below are several abstracts I
located by searching PubMed, a medical database

At the bottom you'll find my search strategy. Please submit a
clarification request if you have questions related to my search.

rapidreference-ga


PubMed
<http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed>


European Journal of Ultrasound 2002 Oct;15(3):165-71 

EFSUMB: safety tutorial: epidemiology of diagnostic ultrasound
exposure during pregnancy-European committee for medical ultrasound
safety ECMUS). Salvesen KA.
Department of Obstetrics and Gynecology, National Center for Fetal
Medicine, Trondheim University Hospital St Olav, N-7006, Trondheim,
Norway.pepes@medisin,ntnu.no

The present paper summarizes some of the epidemiological studies of in
utero ultrasound exposure and subsequent childhood
development.Emphasis is placed on birth weight, childhood
malignancies, neurological development, handedness and speech
development. The epidemiological evidence does not indicate any
association between diagnostic ultrasound exposure during pregnancy
and reduced birth weight, childhood malignancies or neurological
development. However, a
statistically significant association between ultrasound and
left-handedness among males has been found in three studies.
Thus,there is still need for more research.
                      

Lancet 1992 Jan 11;339(8785):85-9 


Routine ultrasonography in utero and school performance at age 8-9
years. Salvesen KA, Bakketeig LS, Eik-nes SH, Undheim JO, Okland O.
Department of Community Medicine and General Practice, University of
Trondheim, Norway.

Most fetuses in developed countries are exposed in utero to diagnostic
ultrasound examination. Many pregnant women express concern about
whether the procedure harms the fetus. Since most routine ultrasound
examinations are done at weeks 16-22, when the fetal brain is
developing rapidly, effects on neuronal migration are possible. We
have sought an association between routine ultrasonography in utero
and reading and writing skills among children in primary school. At
the age of 8 or 9 years, children of women who had taken part in two
randomised, controlled trials of routine ultrasonography during
pregnancy were followed-up. The women had attended the clinics of 60
general practitioners in central Norway during 1979-81. The analysis
of outcome was by intention to treat: 92% of the "screened" group had
been exposed to ultrasound screening at weeks 16-22, and 95% of
controls had not been so exposed, but there was some overlap. 2428
singletons were eligible for follow-up, and the school performance of
2011 children (83%) was assessed by their teachers on a scale of 1-7;
the teachers were unaware of ultrasound exposure status. A subgroup of
603 children underwent specific tests for dyslexia. There were no
statistically significant differences between children screened with
ultrasound and controls in the teacher-reported school performance
(scores for reading, spelling, arithmetic, or overall performance).
Results from the dyslexia test sample showed no differences between
screened children and controls in reading, spelling, and intelligence
scores, or in discrepancy scores between intelligence and reading or
spelling. The test results classified 21 of the 309 screened children
(7% [95% confidence interval 3-10%]) and 26 of the 294 controls (9%
[4-12%]) as dyslexic. The risk of having poor skills in reading and
writing was no greater for children whose mothers had been offered
routine ultrasonography than for those whose mothers had not been
offered the procedure.

Publication Types: 
Clinical Trial 
Multicenter Study 
Randomized Controlled Trial 



Obstetrics and Gynecology 1984 Feb;63(2):194-200 Related Articles,
Links

Short- and long-term risks after exposure to diagnostic ultrasound in
utero.
Stark CR, Orleans M, Haverkamp AD, Murphy J.

A total of 425 children exposed to diagnostic ultrasound at three
Denver hospitals during the period May, 1968, through August, 1972,
and 381 matched control children were studied for adverse effects at
birth and again at a special examination between seven and 12 years of
age. Apgar scores, gestational age, head circumference, birth weight,
length, congenital abnormalities, neonatal infection, and congenital
infection were measured at birth. At seven to 12 years of age,
measurements included conductive and nerve measurements of hearing,
visual acuity and color vision, cognitive function, behavior, and a
complete and detailed neurologic examination. No biologically
significant differences between exposed and unexposed children were
found.



Search Strategy:

-google search on "pubmed"

-search pubmed for "Ultrasonography AND Dyslexia"