Maternal microchimeric cells (MMc) transfer across the placenta during pregnancy. Increased levels of MMc have been observed in several autoimmune diseases including type 1 diabetes but their role is unknown. It has been suggested that MMc are 1) effector cells of the immune response. 2) targets of the autoimmune response or 3) play a role in tissue repair. https://www.freaknleather.com/product-category/hardfacing-mig-wire/