found this on preeclampsia.org in the FAQs
Will I get preeclampsia in a subsequent pregnancy?
- If my first pregnancy was normal?
If you had a normal first pregnancy, your risk of having preeclampsia in the next pregnancy is very low, however if you have other risk factors (such as advanced maternal age, excess weight, family history of hypertension) you should still be watchful and alert to early warning signs. A study in Aberdeen, Scotland showed that nearly 1 in 150 women whose blood pressures had been entirely normal in their first pregnancy had preeclampsia in a second pregnancy. (ref: Preeclampsia: The Facts by Redman, Walker 1992)
- If I had preeclampsia in my first or an earlier pregnancy?
There has not been significant research looking at the rate of reoccurrence in subsequent pregnancies, however the consensus among experts is that preeclampsia in a previous pregnancy is the single largest risk factor for developing preeclampsia. It is entirely wrong to say that if you had it in your first--you will not get it again. The risk of having it again is approximately 20%, however experts cite a range from 5-80% depending on when you had it in a prior pregnancy and how severely you had it.
The risk increases if since your previous pregnancy you have developed chronic hypertension, diabetes, or if you are having IVF, twins or other multiples, as well as the risk factors mentioned above.
- If I had it in a first but not a second?
If you do not have preeclampsia in a second pregnancy, your risk for reoccurrence in a third is low, though it can happen.