Management of Mild Preeclampsia at 37 Weeks

Immediate Next Steps

The American College of Obstetricians and Gynecologists recommends performing a biophysical profile, including ultrasound assessment of fetal biometry, amniotic fluid volume, fetal breathing movements, body movements, and tone, to determine the urgency and mode of delivery in patients with mild preeclampsia at 37 weeks 5, 1
Continuous electronic fetal monitoring should be used to assess for decelerations or other concerning patterns that would indicate non-reassuring fetal status requiring expedited delivery 4, 6

The American Heart Association recommends assessing current blood pressure and treating if ≥140/90 mmHg with target diastolic BP of 85 mmHg and systolic BP 110-140 mmHg in patients with mild preeclampsia at 37 weeks 1, 5, 4
Oral nifedipine, labetalol, or methyldopa should be used for non-severe hypertension, and if BP ≥160/110 mmHg, initiate urgent treatment with oral nifedipine or IV labetalol/hydralazine in a monitored setting 1, 4, 6
Magnesium sulfate should be administered if the patient has proteinuria with severe hypertension (≥160/110 mmHg) or any neurological signs/symptoms (headache, visual changes) 1, 3, 4

A complete blood count focusing on hemoglobin and platelet count should be obtained to assess for progression to severe features in patients with mild preeclampsia at 37 weeks 4, 6
A comprehensive metabolic panel including liver transaminases (AST/ALT), creatinine, and uric acid should be obtained to assess for end-organ damage 1, 2, 4

The International Society for the Study of Hypertension in Pregnancy recommends planning for delivery after maternal stabilization (if severe features present) and prefers vaginal delivery unless cesarean is indicated for standard obstetric reasons 6, 1, 2, 5, 3

The American College of Obstetricians and Gynecologists recommends not delaying delivery based solely on the non-reactive NST; at 37 weeks with preeclampsia, delivery is indicated regardless of fetal testing results 1, 2, 3
Do not underestimate disease severity based on the "mild" classification—all preeclampsia can rapidly progress to emergencies 5, 4