The diagnosis of eclampsia, a type of hypertensive disorder in pregnancy, should be monitored from before pregnancy, with particular attention to blood pressure and maternal symptoms from 20 weeks of pregnancy to the first week of the puerperium. Eclampsia is a major cause of maternal and perinatal morbidity and mortality, and can occur at different stages of prenatal, perinatal and postnatal life, seriously affecting the health of both mother and child. Eclampsia in pregnancy refers to the absence of hypertension and neurological disorders such as epilepsy before pregnancy. After 20 weeks of gestation until the first week of puerperium, unexplained convulsions occur during pregnancy checkup and delivery, and on top of that, proteinuria, edema, cramps, coma and HELLP syndrome occur. Therefore, pregnant women should start to pay attention to their blood pressure during the preparation for pregnancy and perform regular maternity checkups during pregnancy according to medical advice. If hypertension is detected for the first time at 20 weeks of pregnancy, high alert for eclampsia should be observed. In addition, it is important to closely monitor the changes in blood pressure and urine tests during pregnancy and to enhance care.