What are the best ways to truly prevent UTI during pregnancy? Thanks.

Hydrate, Probiotics. Staying well hydrated is a simple way to decrease the frequency of urinary infections. A probiotic supplement, supplying "healthy" bacteria, may help restore balance to the bacterial population in the intestine, and has the added benefit of reducing yeast infections. Yogurt is a good example of a probiotic, also supplying a calcium source. Cranberry tablets have protective benefits, too.