妊娠的晚期,約在24週後,如出现水腫、血压增高、蛋白尿、头痛、视觉障碍、食慾減退、胸部不適,相繼的發生搐搦或昏迷等症狀叫作子癇。子癇是山妊娠所引起的症候羣,因为不怀孕時是不会有的。当子癇發生后,一旦分娩了,症狀常常会迅速的消失。这充分的說明妊娠是子癇的致病原因。但是它發生的机轉究竟是 Symptoms such as edema, increased blood pressure, proteinuria, headache, visual disturbances, loss of appetite, chest discomfort, and subsequent convulsions or coma are known as eclampsia at about the second trimester of pregnancy. Eclampsia is a syndrome caused by mountain gestation, because it will not happen when not pregnant. When eclampsia, once delivered, the symptoms often disappear rapidly. This fully shows that pregnancy is the cause of eclampsia. But what happened to it?