ScienceDaily (Apr. 28, 2010) — Preeclampsia is a high blood pressure syndrome in pregnant mothers that is caused when the blood supply in the placenta of the developing baby is restricted. The blood-deprived placenta releases factors that cause the raise in blood pressure in the mother. Doctors have to monitor these women closely and they may be forced to deliver the baby early to protect the mother and the baby. Most women's blood pressure returns to normal levels after they deliver the placenta.
Women that develop preeclampsia paradoxically seem to have reduced incidence of developing breast cancer. But why this serious condition may have other beneficial effects is unknown.