TGFB2 and cancer: It has been reported that TGFβ2 and TGFβR2 formed a complex to promote migration/invasion in VBW myofibroblasts cancer cells.[54] To validate this in human trophoblast cells, we performed IP assays and found that TGFβ2 and TGFβR2 could be pulled down by each other in both Swan 71 and HTR‐8/SVneo cells (Figure S4C, Supporting Information), indicating the formation of protein complex in trophoblast cells.