success after a miscarriage

How many ladies here have had successful pregnancies after a miscarriage? When I had mine I wasn't really given any reason as to what caused it, I know doctors won't run any tests or anything really until your 2-3rd one, but they basically just told me that many times there is no reason and is bc the egg/sperm is not viable...so I was just wondering for anyone who has had a mc if you went on to have healthy pregnancies afterwards and how likely that really is?