- Sonohysterography for assessment of uterine abnormalities
- Anticardiolipin antibody (IgG and IgM) titer and lupus anticoagulant performed twice, six to eight weeks apart
- Thyroid stimulating hormone (TSH) and thyroid peroxidase antibodies
- Parental karyotype and karyotype of the abortus if the above examinations are normal
Additional testing depends upon the diagnosis suggested by the history, physical examination, and laboratory results.