PDOG, IMO if you treat the sourdough product as you would a piece of raw meat from start to finish I wouldn't worry about it at all, meaning do not cross contaminate the finished baked product with any raw starter. Honestly, some people on this board are probably are more knowledgeable about the subject than the doctor that might be asked. You do not see the Boudin bakery with a pregnant woman warning at the front door. I really only am answering as I have faced the question many times before, and with both ends of the spectrum, do I feed it to my 96 year old grandmother, or my friends pregnant wife. Everything has been fine so far and I would suspect continue to be. I assuming you have a healthy reliable starter. Also of note, I have seen in print on flour bags that the flour must be cooked before consumption and is not meant to be eaten raw. There is a maximum level of e-coli standard that must be met, so I think that means there is usually some present. Again, safe handling and common sense, I think that chances are extremely low of anything going wrong. I commend you for thinking about it though. -Marc