Women who have had two or more induced abortions have a reduced risk of pre-eclampsia by 60 %.
It is not currently understood to what degree physical activity during pregnancy protects against pre-eclampsia, compared to previous studies.
Reduced risk for pre-eclampsia among women who have aborted
One study shows that women who have had two or more induced abortions reduced their risk for pre-eclampsia by 60 percent.
That is, they are as well protected against pre-eclampsia as women who have previously given birth to a child.
Women who have had one termination previously, have an approximately 16 % reduced risk for pre-eclampsia compared with women who have never had an abortion. There was no protective effect linked to having had a miscarriage [signs of miscarriage] previously.
Information from 20,846 women was studied. All the women were first-time mothers, and some had previously had miscarriages or abortions.
The results indicate that every normal pregnancy, even if it ends before birth, to some degree will protect against pre-eclampsia in a later pregnancy, almost like a vaccination.
The mechanisms for this effect are currently unknown, and more research is necessary. Miscarriages do not appear to protect against pre-eclampsia.
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