I would also ask which ingredient/s your doctor has a problem with, so that you can avoid it if you use any other processed foods. But I can see wanting to avoid sugar alcohols and stevia during pregnancy.
I think that the real issue goes back a step, maybe? You don't say what level you're competing at, but I think most people's stomachs can handle real food on the bike until they get up around lactate threshold for extended periods of time. Maybe you just want to take a break from competition until after your baby's born? Unless you're at a high level of competition and being monitored by an OB with a lot of sports med experience, you probably don't want to sustain that level of exertion anyway. In which case your stomach should be able to handle either real food, or for convenience, processed foods such as LaraBars that are less refined.
JM (very inexperienced) O.
Speed comes from what you put behind you. - Judi Ketteler