UCHL1 and spontaneous abortion: In the present study, we found that the expression of UCHL1 was dramatically decreased in decidua from patients suffering miscarriage, accompanied by aberrant decidualization indicated by the downregulation of decidual markers IGFBP1 and PRL [25] and decreased dNKs due to reduced production of CXCL12, IL15 and TGF-β from DSCs.