Choosing a prenatal is one of the first of many decisions moms-to-be make, and it isn’t an easy one. The ingredient list can be confusing, the pills themselves are large, and they come in a bewildering variety. A search on Amazon yields 507 hits for “prenatal vitamins,” plus there are direct-to-consumer brands. Though there are a core set of nutrients that are the same across all prenatals, some h