Prenatal Vitamins

I'm so new to this, husband and I are trying for 1st. Was just kind of letting things happen and see but he is really getting into tracking. I have ovulation tests now thanks to him lol my question is, what am I suppose to be taking vitamin wise to help the process along? I keep seeing people post about prenatal vitamins but I thought that was something you took after you were pregnant?? So confused.... Please help!