I worked for a ob/gyn for over 6 six years. I've learned that you should call your dr and ask for a prescription. I like prima care. It has all the new stuff like omega 3, amino fatty acids and the fish oil stuff they are saying everyone needs when they are pregnant or trying. The dr I use to work for would recommend the husband take a good vitamin as well when trying to concieve. He always said taking prenatal vitamins was the key . It could determine weather you have a einstien or a "bubba". He was very blunt with all his patients. Also if you can get on them 6 months before you concieve and if for some reason you have bad morning sickness when you do get pregnant you'll be ok to skip for awhile during your pegnancy and you don't have to regret not being able to take them because you already have a good foundation and they are in your system. Hope this helps.
ps.
Don't mess with the over the counter prenatals if you don't have to. They will never be a good as prescription. Don't get me wrong anything is better than nothing and an extra folic acid is great advice, but ask your dr what he recommends. If I'm not mistaken the prima care vitamin I recommended has some folic acid in it.
-C.