Objective:　To　investigate　the　maternal　hemodynamic　changes　that　occurs　during　pregnancy.　To　find　out　the　difference　that　lie　in　healthy　pregnancy　and　women　with　gestational　hypertension.　To　introduce　a　method　that　is　applied　to　shift　high-risk　women　of　gestational　hypertension　in　pregnancy　women.　Method:　Serial　hemodynamic　investigations　(total　8　times)　were　performed　throughout　pregnancy　period　by　radioulnar　pulse　wave　electrical　monitoring　in　182　women　(130　with　healthy　pregnancies,　52　with　gestational　hypertension).　Analysis　of　variance　with　repeated　measurements　was　used　to　evaluate　the　course　of　a　number　of　hemodynamic　indices.　To　identify　the　correlation　between　these　changes　and　gestational　hypertension　by　using　above　method.　Results:　A　significant　difference　in　mean　arterial　pressure　(MAP),　cardiac　output　(CO),　cardiac　index　(CI),　total　Peripheral　Resistance　(TPR)　and　heart　rat　(HR)　was　observed　different　between　normal　pregnancy　and　women　with　gestational　hypertension.　The　changes　of　parameters　in　normal　woman　and　gestational　hypertension　were　recorded　and　the　mechanism　of　gestational　hypertension　was　heterogenous.　Conclusion:　These　results　provide　sensitive　parameters　for　use　in　early　risk　assessment　and　as　a　guide　to　preventive　intervention　during　pregnancy.