Most common reason for abortions is chromosomal abnormalities. But you can get these test done to find any reason.
1. You can get the lupus anticoagulant
to rule out Antiphospholipid syndrome
2. Get the tests done: Factor V Leiden
variant and the prothrombin mutation, Factor VIII levels, MTHFR mutation.These tests will rule out genetic hrombophilia,
Some infections cause heart problems. Usually they are done during pregnancy There are a battery of tests called TORCH which detects Toxoplasmosis, Rubella, Cytomegalovirus
, Herpes simplex
virus, syphilis during pregnancy.