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Box plots of mean SWS from each sample vs. cervical canal location for each group and cervix half: unripened (a–b) and ripened (c–d); anterior (a,c) and posterior (b,d) slices. The boxes represent interquartile range (IQR), interior line is median, whiskers are maxima and minima within 1.5*IQR, and cross markers show outliers beyond the 1.5*IQR.
