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Figure 1 . The prenatal screening and prenatal diagnosis results
of patient(A-The T-score of chromosome 20 detected by NIPT; B-Karyotype
analysis of maternal amniotic fluid (46, XX, add(21)(p12)); C-Copy
number variation of maternal amniotic fluid showing that a duplication
of 21.41Mb on chromosome 20p11.22-p13)