After questioning our doctor as to why our son occasionally had a fishy smell, our son was diagnosed as a carrier of trimethylaminuria. Through genetic testing, it was identified that he has a heterozygous mutation. This obviously means that at least either myself or my husband is a carrier also. What are the carrier incidence rates? I am currently pregnant and am wondering what the chances are that future children could have the full syndrome. In other words, what are the chances that the both my husband and I are carriers?