J.B.
Well, it's important to be in good shape physically when trying to conceive and especially to make sure you're getting plenty of folic acid prior to conception, but there's no vitamin that will make you get pregnant. Pick up some prenatal vitamins (a multi-vitamin) at the drugstore, a health or vitamin store or somewhere. You can get prenatal vitamins anywhere vitamins are sold, but make sure you look for good brands with no fillers or artificial ingredients and preservatives. Doctors can and do prescribe them, but I've had a number of doctors tell me there's not reason for it when you get the same thing OTC -unless you have an iron/anemia issue. So, go ahead and start taking them while you're trying to get pregnant.