>I am aware that using an amnio for testing can show false mosaic positives >if: >a. there was a prev trisomy pregnancy and some of the cells are still >hanging around in the womb >b. the mom may be an undiagnosed mosaic and some of her cells show up in the >amnio >(there's a theory that mosaics live among us, not ever diagnosed as they >don't have any (or few) 'symptoms' of a genetic disorder. And c. you can have just the placenta carrying the mosaic trisomy, baby & mom perfectly normal. Fawna, mom to Philina 23 yrs (PT6p & Moya Moya Syndrome) Research Coordinator: Tracking Rare Incidence Syndromes (TRIS) project - We are currently enrolling all varieties of rare trisomy, living & deceased, for the main project database. To include your child's data and help update the medical literature please see: http://web.coehs.siu.edu/Grants/TRIS/ And to add a link for your Trisomy child's personal web page please see: http://www.livingwithtrisomy.org/ Building ___ooOOoo__ Rainbows www.trisomyonline.org Families Helping Families On-line