Acid Reflux, prilosec, and TTC & pregnancy

The category C thing is kind of tricky. "Proving" a drug is safe for pregnancy can be complicated legally and ethically. I don't have time to dig up primary sources, but the wikipedia page summarizes it well: "One characteristic of the FDA definitions of the pregnancy categories is that the FDA requires a relatively large amount of high-quality data on a pharmaceutical for it to be defined as Pregnancy Category A" http://en.wikipedia.org/wiki/Pregnancy_category

But, for something to be class C it means they never seen an adverse effect in a human, but just haven't been able to meet the standard to claim authoritatively that it couldn't. Given this is a drug you already take regularly and your doctor feels totally comfortable with, I honestly don't think you're really taking a risk. Just my 2 cents. I"m a big believer that moms keeping themselves healthy is good for their babies.