TGFB2 and spontaneous abortion: To explore the association among TGFβ2 pathway, migration/invasion, migrasome formation, and miscarriage in vivo, we constructed a BaP‐exposed mouse miscarriage model, which has been widely used in various miscarriage studies.[38, 41, 50] The embryo adsorption was increased and miscarriage rates were elevated in this mouse miscarriage model (Figure2A–C, n = 6), confirming the successful construction of this model.