If I have melas, will I pass this on to a child I might have in the future?

Yes, if you are..... Yes, if you are a woman, no, if you are a man. Melas (mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes) is caused by mutation of mitochondrial dna. Mitochondrial inheritance is strictly maternal, because the mitochondrial of the zygote are supplied by the ovum and not by the sperm.