Good for you for wanting to get started on folic acid early. The most crucial time for folic acid is before most women even know they are pregnant, so it's good for all women of childbearing age to take it.

Yes, what you buy at the pharmacy is the same as what your doctor would prescribe. The only reason you might want to use your doctor's prescription is if you have insurance--especially insurance that will let you get a 3-month supply for one co-pay. It might be cheaper that way.

exactly, most doctors will tell you a year on prenatals is good if you are planning a baby, but atleast 3 mon..If it is a surprise, start as soon as possible