Finally, pathway analysis indicated that SNPs suggestively associated with PPD (P < 1e‐03) were significantly over‐represented in pathways involved in long‐term depression, salivary secretion, GnRH signaling, glutamatergic synapse, oxytocin signaling, cell adhesion molecules (CAMs), Rap1 signaling, and cancer‐related pathways. This evidence concerns the gene OXT and progressive pseudorheumatoid arthropathy of childhood.