Reoccurring miscarriages

So I had my 1st (BO) miscarriage in Feb and now my 2nd miscarriage 2 weeks ago. My doctor told me that after my levels get to negative again she wants to test my husband and I to make sure there it’s not a chromosomal abnormalities issue. Has one else have this issue but turned out to be ok or eventually carried to full term? What supplements can my husband take? I’ve been taking eu natural conception vitamins and I believe they helped me become pregnant both times.