One a day vitamins?

Me & my husband have been ttc for almost 3 years and nothing, not even one positive pregnancy test! We think that we both may have fertility issues but haven't been checked. We figured we might give these a try before we get to the doctors. So, here's my question. How many people started taking the one a day vitamins & ended up pregnant after having struggles with ttc? It'd be nice to hear some encouraging stories at this point!