I have celiac disease, my mom has it, and both of my children have it. My brother, however, tested negative. His wife is now due any moment with their first child and they are wondering if she will need to avoid gluten while breastfeeding even though my brother does not have the disease. They are concerned that the baby might have celiac disease, but neither of them wants to have my sister-in-law have to avoid gluten if it's unnecessary.
I'm not sure how the genetics of celiac disease work so I thought I'd ask the knowledgable people here. Can a child have celiac disease if both parents don't? Thanks so much!