Consecutive miscarriage can be due to poor quality of eggs or sperms. You should go for IVF PGD to test the quality of the embryo before placing it into the uterus. Sometimes, due to age the quality of gametes deteriorates.
If you are having more than one miscarriages, then you need to make sure that you discuss with your doctor about PGD when performing IVF procedure. This advanced procedure helped me a lot when I was trying for a baby. Hope this helps you too!