What Are The Chances? in Celiac Disease Pre-Diagnosis, Testing & Symptoms Posted May 11, 2013 · Report to Admin I was told my children had a 50 % chance of carrying the gene. But that was based on the information that I am 4/4 alleles for Celiac. I would say you might need more information. Well we went ahead and had the blood draws for them done yesterday, I am just trying to gauge the likelihood. My husband and I haven't been tested yet. I'm a bit overwhelmed but we see a dietician at childrens hospital on the 24th so I'm trying to educate myself as much as possible by that time.