Figure 2

General descriptive characteristics of expressions in eutopic and ectopic endometrium. (A) Histogram of frequency distribution of probes (genes) for different groups of expression levels (in log₂) in eighteen (18) autologous, paired eutopic (blank bar) and ectopic (hatched bar) endometrial samples. (B) Two-way representation of unsupervised hierarchical cluster analysis (HCA) of the expression levels (in logarithmic scale) of all the target probes/genes (Y-axis) in each sample (each column), eutopic labelled as A and ectopic labelled as B from all subjects (n = 18) and their clustering based on expressional distance (Pearson correlation coefficient) between samples in dendrogram formation (X-axis). Each horizontal line represents a single probe, and each column represents a single sample. Relative expression of each probe is colour-coded: high (red) and low (blue), as indicated in the colour legend. Categorical annotations of each sample are shown in the X-axis. The samples cluster by cycle phase and severity stages, as shown by the bar at the bottom of the heat map: proliferative phase (black bar), secretory phase (crossed white bar), stage 3 (red crossed bar) and stage 4 (blank red bar). A, eutopic; B, ectopic; P, proliferative phase; S, secretory phase; 3, stage 3; 4, stage 4.