Here is one list from this thread:http://www.preeclampsia.org/forum/viewtopic.php?t=31665
Your doctor might want to do some different tests. This list is about 5 years old, but I think it is still reasonably current.
"There are several lists of tests floating around on the various preeclampsia sites, but here is the most comprehensive one I've seen (my OB recommended most, but not all, of the tests):
Lieden Factor V mutation R560Q (DNA test by PCR)
Hyperhomocysteinemia MTHFR Mutation (DNA test by PCR)
Prothrombin Gene Mutation 20210 (GA) (DNA test by PCR)
Protein C levels
Protein S levels
Activated Protein C activity
Antibodies to 6 phospholipids of the IgM, IgG and IgA classes
Lupus anticoagulant antibody
Russell Viper Venom time
Activated partial thromboplastin time (APTT)
Prothrombin time (PT)and Partial prothrombin time (PPT)"