In addition, anti‐phosphatidylethanolamine (anti‐PE) IgG, IgM10, 11 antibodies and anti‐phosphatidylserine/prothrombin (anti‐PS/PT) antibodies,12, 13 which are termed as seronegative APS (SNAPS), are also potentially associated with RPL, despite being excluded from the Sydney classification criteria.14, 15. This evidence concerns the gene F2 and autoimmune polyendocrinopathy.