High maternal blood pressure is gestational hypertension, the reasons can be seen in the following cases: 1, excessive mental tension or stimulation resulting in central nervous system dysfunction, the main treatment is to regulate the emotions, when the emotions improve blood pressure can naturally fall to normal; 2, the pregnant woman has chronic hypertension, blood pressure during pregnancy may be higher, blood pressure should be controlled, the whole pregnancy need to monitor blood pressure. 3, uterine tension too high, such as excessive amniotic fluid, twin pregnancies, and pregnant women with huge babies can also cause high blood pressure. 4, a family history of hypertension, especially if the parents have a disease of hypertension, also need special attention. Blood pressure during pregnancy must be paid attention to, if hypertension occurs to take drugs in a timely manner to avoid the occurrence of Zi Xian, if necessary, the need to terminate the pregnancy.