by caryn (10146 Posts), Mon Jun 29, 2009 04:34 am
...The risk of pre-eclampsia was 4.1% in the first pregnancy and 1.7% in later pregnancies overall. However, the risk was 14.7% in the second pregnancy for women who had had pre-eclampsia in their first pregnancy and 31.9% for women who had had pre-eclampsia in the previous two pregnancies. The risk for multiparous women without a history of pre-eclampsia was around 1%. The incidence of pre-eclampsia associated with delivery before 34 weeks' gestation was 0.42% in primiparous women, 0.11% in multiparous women without a history of pre-eclampsia, and 6.8% and 12.5% in women who had had one or two previous pregnancies affected, respectively. The proportion of women who went on to have a further pregnancy was 4-5% lower after having a pregnancy with any pre-eclampsia but over 10% lower if pre-eclampsia was associated with very preterm delivery... Findings are consistent with the existence of two distinct conditions: a severe recurrent early onset type affected by chronic factors, genetic or environmental, and a milder sporadic form affected by transient factors.
So if you delivered before 34 weeks, you're one in about two hundred, and you're 10% less likely to have another pregnancy than someone without that history. That last bit is probably both because you and your partner are scared sh*tless *and* because some preeclamptics develop immune responses to subsequent pregnancies that interfere with placentation enough that subsequent pregnancies miscarry.
If you want to read the full text of the study, it is linked from the abstract, to the right of the journal's name, in a box reading "full text -- free".
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