Evaluation	Rationale
Hemoglobin and hematocrit	Hemoconcentration supports diagnosis of preeclampsia and is an indicator of severity. Values may be decreased, however, if hemolysis accompanies the disease.
Platelet count	Thrombocytopenia <100 × 103 per μL (100 × 109 per L) suggests severe preeclampsia.
Quantification of protein excretion	Pregnancy hypertension with proteinuria should be considered preeclampsia (pure or superimposed) until proved otherwise.
Serum creatinine	Abnormal or rising levels, especially when associated with oliguria, suggest severe preeclampsia.
Serum uric acid	Increased levels suggest the diagnosis of preeclampsia.
Serum transaminase	Rising values suggest severe preeclampsia with hepatic involvement.
Serum albumin, lactic acid dehydrogenase (LDH), blood smear and coagulation profile	In women with severe disease, these values indicate extent of endothelial leak (albumin), presence of hemolysis (LDH increase, schistocytosis, spherocytosis) and possible coagulopathy.