THE RELATIONSHIP BETWEEN HEMOGLOBIN AND HEMATOCRIT IN THE FIRST TRIMESTER OF PREGNANCY AND THE INCIDENCE OF PREECLAMPSIA

Introduction: Pregnancy and childbirth are among the most important events in every woman's life. Although pregnancy is not a disease and is a physiological and natural process, it may be followed with complications, and pregnancy cares can prevent the incidence of many problems. Methods: In this review article, the databases Medline, Cochrane, Science Direct, and Google Scholar were thoroughly searched to identify the relationship between hemoglobin and hematocrit in the first trimester of pregnancy and the incidence of preeclampsia. In this review, the papers published until early January 2017 that were conducted to study the relationship between hemoglobin and hematocrit in the first trimester of pregnancy and the incidence of preeclampsia were selected. Results: Hemoglobin hematocrit test is one of the common tests of pregnancy. Hematocrit includes the ratio of the volume of erythrocytes to the total volume of blood that is shown as a percentage or a decimal fraction. Discussion and conclusion: Hypertensive disorders during pregnancy is one of the most important complications of pregnancy that account for three most important causes of maternal mortality together with hemorrhage and infection. Key words: hemoglobin ،hematocrit ،first trimester ، pregnancy ،preeclampsia