The normal value of blood pressure in pregnant women varies from person to person, and each pregnant woman has different standards of measurement. The average normal blood pressure range for a healthy young woman is generally 110/70mmHg-120/80mmHg. If the blood pressure is above 140/90mmHg at least twice in a week when it is normally normal, the doctor will perform additional tests to determine if pre-eclampsia has set in. A non-normal reading on one occasion is not a determination of abnormality and may only be due to the woman having just over-exercised or being psychologically stressed, and will usually be taken again at 5-10 minute intervals to confirm the blood pressure status. Generally, a systolic blood pressure of 140 mmHg or higher and/or a diastolic blood pressure of 90 mmHg or higher is considered hypertensive. Persistent hypertension during pregnancy can affect the health of the pregnant woman on the one hand and the normal development of the fetus in the uterus on the other. Therefore, it is important to take care of regular blood pressure measurement during pregnancy, and once it is found to be elevated, it is necessary to follow medical advice for standard monitoring and evaluation and treatment. Attention should also be paid to the treatment of various complications caused by hypertension, such as gestational hypertension syndrome. If the symptoms of hypertension do not resolve in the middle or late stages of pregnancy, the doctor may terminate the pregnancy or deliver the baby early to protect the woman’s safety. In addition, women should pay attention to a low-salt, low-fat and light diet and proper weight control during pregnancy to prevent the appearance of hypertension.