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D-dimer during pregnancy. The box plots represent the central distribution of the D-dimer concentration (25th–75th percentile), while the horizontal bar in the middle of each box plot represents the median value. The “whiskers” represent the range of values, excluding outliers (circles) and extreme values (asterisks). The results are provided for each gestational week (11–41). The horizontal line represents the conventional threshold of 0.5 mg/L (FEU).
