Also, even if your future niece/nephew does end up developing Celiac, it may not kick in until they're older, so not sure if a non-Celiac mother eating gluten while breastfeeding would really be a problem (but don't quote me on that). It would be a good idea for them to get him/her tested periodically when they're old enough and watch out for symptoms.
As for the genetics, there's Celiac on BOTH sides of my family. My mom and 2 of her siblings have it. We don't know if my father had it (he passed away many years ago) but 2 of his siblings have it, so that means he would likely have been a genetic carrier.
And for some reason (maybe cause 2 positives sometimes make a negative) my sister and I both came back negative on our blood tests, but there was definitely damage on her biopsy, and even though I went gluten-free before I got a biopsy done (and will never ever ever go back), I consider myself Celiac cause, really, genetically I'm screwed.
Some of my cousins (mostly children of aunt/uncle with celiac) have gone gluten-free as well, though I'm not sure how many actually have Celiac or are just gluten intolerant. But considering the size of my parents' families, there are more of us who don't have problems than those who do.
Anyway, that's a long way of saying that the baby may or may not have the genes, and if they do, they may or may not develop Celiac.
Hope someone else has more info
~ Be a light unto yourself. ~ - The Buddha
- Gluten-free since March 2009 (not officially diagnosed, but most likely Celiac). Symptoms have greatly improved or disappeared since.
- Soy intolerant. Dairy free (likely casein intolerant). Problems with eggs, quinoa, brown rice
- mild gastritis seen on endoscopy Oct 2012. Not sure if healed or not.
- Family members with Celiac: Mother, sister, aunt on mother's side, aunt and uncle on father's side, more being diagnosed every year.