I just ran out of prenatal vitamins and am about to go buy some more. What are your favorites? I usually like Nature Made, if they are on sale. However, when they are not on sale they are super expensive! I am leaning toward just buying a store brand for a fraction of the cost. I know CVS has a brand of prenatals, for instance. What do you guys think? Pay for the national brand product, or go for a cheaper version? Is there a benefit to the more expensive brands that I am not seeing? Thanks!