Abstract

Introduction:. Every year, 75 thousand maternal deaths occur owing to hypertensive disorders. Although numerous studies have been conducted on this disease, its cause is still unknown. Although some risk factors have been reported for preeclampsia, this disease is only diagnosed with its own clinical presentations and it is often diagnosed late. Methods: In this review article, the databases Medline, Cochrane, Science Direct, and Google Scholar were thoroughly searched to identify the relationship of the first and third trimester hematocrit levels and preeclampsia .In this review, the papers published until early January 2017 that was conducted to study. The relationship of the first and third trimester hematocrit levels and preeclampsia were selected. Results: The studies indicate that hemodynamic changes during pregnancy have no effect on the increased plasma volume in the second trimester in women suffering from preeclampsia. Thus, it can be concluded that disruption in the increased plasma volume in the second trimester is likely to be a risk signal of suffering from preeclampsia in the subsequent weeks of pregnancy. Discussion and Conclusion: Determining hematocrit is one of the common and necessary measures taken during pregnancy. If hematocrit level of the first trimester is more than 43, it has to do with the preeclampsia at the end of the third trimester. Every year, 75 thousand maternal deaths occur owing to hypertensive disorders.