LEFt Rule for DVT in Pregnancy Sponsored Advertising placement LEFt Rule for DVT in Pregnancy Clinical Decision Tool Records the three LEFt features associated with DVT in pregnancy. Symptoms in Left Leg No Yes Calf Difference ≥2 cm No Yes First-trimester Presentation No Yes Calculate LEFt Rule for DVT in Pregnancy Clear Calculator ☆ Log in to save Save this calculator to your MDPDA account. + Add to Toolkit Log in to save incomplete calculator progress and return later. Log in to save progress Clinical Decision Support Only MediCalc calculators are intended to support qualified healthcare professionals and must not replace professional clinical judgement. Do not enter patient-identifiable information into Saved Progress. Read our Clinical Disclaimer Sponsored Advertising placement