When is gestational age a risk factor for preeclampsia?

Updated: Nov 29, 2018
  • Author: Kee-Hak Lim, MD; Chief Editor: Ronald M Ramus, MD  more...
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Answer

Answer

In a registry-based cohort study of 536,419 Danish women, delivery between 32 and 36 weeks’ gestation increased the risk of preterm delivery in the second pregnancy from 2.7% to 14.7% and increased the risk of preeclampsia from 1.1% to 1.8%. A first delivery before 28 weeks increased the risk of a second preterm delivery to 26% and increased the risk of preeclampsia to 3.2%.

Preeclampsia in a first pregnancy, with delivery between 32 and 36 weeks' gestation, increased the risk of preeclampsia in a second pregnancy from 14.1% to 25.3%. Fetal growth 2-3 standard deviations below the mean in a first pregnancy increased the risk of preeclampsia from 1.1% to 1.8% in the second pregnancy. [36]

Primigravid patients in particular seem to be predisposed to preeclampsia.


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