Hypertension, which is the most common complication of pregnancy, is a
leading cause of both maternal and perinatal morbidity. Advances in r
esearch related to hypertensive disorders in pregnancy have facilitate
d a better general understanding of the pathophysiologic processes ass
ociated with this disease. Strategies of prevention, early diagnosis,
and newer treatments have contributed to a more favorable outcome for
mothers and their babies. The exact cause of preeclampsia remains elus
ive; however, recent investigations suggest that endothelial cell inju
ry due to free radical-mediated lipid peroxidation may be the initiato
r of the pathophysiologic events of preeclampsia. Future challenges in
this area should include efforts to elucidate mechanisms involved in
free radical cell-mediated vascular disturbances and antioxidant defen
ses.