Is it safe to take multiple supplements for infertility such as: vitamin E, l-carnitine, maca root, ginseng ?

My doctor said that those are pretty safe because they are mostly vitamins and antioxidants but I forgot to ask him if they are safe to take daily as a mix(one of each). I don't know if I should take all or just go with one and that's it? I appreciate your help, Thank You!