vitamins

Hello ladies so I have been tested and doctor says everything is fine with me and my husband!  She won't put me on anything not sure why!  Sending to get tubs checked next then on list for doctor to see if they will try iui but the list is long!  I had a mc feb2016 and still nothing!  Anyways what are some vitamins everyone takes to help?  My sister in laws doctor put her on a hole bunch!  So just see what others have took or take to help get pregnant!  I take materna now!  And have been