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document
Are prenatal ultrasound scans associated with the autism phenotype ? Follow-up of a randomised controlled trial . An existing randomised controlled trial was used to investigate whether multiple ultrasound scans may be associated with the autism phenotype . From 2,834 single pregnancies , 1,415 were selected at random to receive ultrasound imaging and continuous wave Doppler flow studies at five points throughout pregnancy ( Intensive ) and 1,419 to receive a single imaging scan at 18 weeks ( Regular ) , with further scans only as indicated on clinical grounds . There was no significant difference in the rate of Autism Spectrum Disorder between the Regular ( 9/1,125 , 0.8 % ) and Intensive ( 7/1,167 , 0.6 % ) groups , nor a difference between groups in the level of autistic-like traits in early adulthood . There is no clear link between the frequency and timing of prenatal ultrasound scans and the autism phenotype .
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Intervention_Other
prenatal ultrasound scans
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Intervention_Control
controlled
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Intervention_Control
controlled
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Intervention_Other
multiple ultrasound scans
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Intervention_Other
ultrasound imaging
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Intervention_Physical
single imaging scan
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Intervention_Other
prenatal ultrasound scans
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Outcome_Physical
autism phenotype
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Outcome_Mental
autism phenotype
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Outcome_Physical
.
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Outcome_Mental
rate of
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Outcome_Physical
Autism Spectrum Disorder
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Outcome_Mental
level of autistic-like traits
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Outcome_Physical
frequency
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Outcome_Physical
timing
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Outcome_Mental
autism phenotype