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(a) Nucleosome‐based prediction of fetal fraction versus chromosome Y‐based prediction of fetal fraction for both training (blue) and test (red and yellow) samples of XY pregnancies. Red dots mark test samples from a single run. (b) Boxplots of the nucleosome‐based fetal fraction prediction for both training and test data, separated per fetal sex. Additional information on the accuracy of our method can be found in Table S1
