Weighted genome co-expression network analysis (WGCNA)21 was performed using the WGCNA package in R. In the mouse comparisons, 3606 mean DMR values were used with a power of 20 and minimum module size of 10. For all human analyses, 13 091 nominally significant loci in the combined comparison of PPD (N=11) to non-PPD (N=21) euthymic cohort women were used for correlation with a power of 10 and minimum module size of 10.
