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Practice Listening: Select Missing Word
ID: #39939
Short
Ultrasound
Transcript:
Ultrasound is used in prenatal screening and diagnosis. This pregnant woman is a carrier for the genetic illness cystic fibrosis. Her foetus can be diagnosed as early as 12 weeks by using a technique known as chorionic villus biopsy. Foetal cells are removed from the placenta. The DNA from these cells is amplified. And used to produce a (genetic fingerprint).
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