I had gallstones with my son and it stunk. I use to have gallbladder attacks and no one knew what it was and I'd gone to the er multiple times. Dr told me it was heartburn. I later found out I had cholestasis and that's what caused it but the pill I was prescribed for that srunk my gallstones. It was called ursodiol. As for effects to the baby gallstones didn't harm him but the cholestasis made him have to be induced early. Ask your dr about that pill because you can't have surgery till after delivery. I opted to not have it at all and mine went away with the pill.