Which lab tests are performed in the assessment of preterm labor risk?

Updated: May 04, 2021
  • Author: Michael G Ross, MD, MPH; Chief Editor: Carl V Smith, MD  more...
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In patients with a history of midtrimester loss, laboratory tests for risk assessment include the following:

  • Rapid plasma reagin test

  • Gonorrheal and chlamydial screening

  • Vaginal pH/wet smear/whiff test

  • Anticardiolipin antibody (eg, anticardiolipin immunoglobulin [Ig] G and IgM, anti-beta2 microglobulin)

  • Lupus anticoagulant antibody

  • Activated partial thromboplastin time

  • One-hour glucose challenge test

In addition, one should consider TORCH (toxoplasmosis, other infections, rubella, cytomegalovirus infection, herpes simplex), immunoglobulin G, and immunoglobulin M screening whenever the historical or clinical suspicion is present.

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