For example, research has shown evidence to support the links between PPD and dysfunctions in hormones,4, 5 including estrogen,6, 7, 8 progesterone,6, 9 and oxytocin,10, 11 inflammatory systems,12 plasma metabolic13 and neurotransmission systems including GABA14, 15, 16 and glutamate signaling.17, 18. The gene discussed is OXT; the disease is progressive pseudorheumatoid arthropathy of childhood.