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An ultrasound scan is a non-invasive technique that has no associated risk for mother or fetus. Is the following undertaken to detect conditions which are detectable, although sometimes only with serial scans:
Specific markers for chromosomal abnormalities include is an increased nuchal fold. Also bright bowel can alert to the suspicion of a pregnancy at risk of cystic fibrosis, if seen on scan screening both parents would be discussed.
An anomaly scan to pick up structural defects can be performed between 18+0-20+6 weeks.
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