The mitochondria question is interesting. Early on FMS researchers pointed out that about 70 percent of FMS patients have a mother who also has it. True for me. As I looked at the multiple structural issues in my maternal line, and in myself, I kept thinking that it was as if there was not enough 'energy ' in the developing fetus to complete various development stages completely and correctly. ( for example : small skull base, incomplete rotation of the gut, developmental hypoplasia of the maxillae, sacral hypoplasia as evidenced by small sacral holes, or foramina, heart malformations, and more).