In antenatal mothers pregnancy induced hypertension is one of the important cause of maternal, perinatal morbidity and mortality. It is an unpredictable multiorgan disorder unique to human pregnancy. The pathophysiological effects which may range from simple hypertension to multiorgan failure, that occurs in pregnancy for the first time after 20 weeks of gestation. Reviews of some of the important pathophysiological changes that occur in pregnancy induced hypertension were discussed in this article.