What is the most common risk factor for developing pre-eclampsia?

Nulliparity, defined as being a first-time mother, is one of the most significant risk factors for developing pre-eclampsia. Research has shown that women who are having their first pregnancy tend to have a higher incidence of pre-eclampsia compared to those who have previously given birth. This is thought to be related to the body's response to the placenta and the unique physiological changes that occur during a first pregnancy.

While other factors such as age over 35, obesity, and a history of diabetes can contribute to the risk of pre-eclampsia, nulliparity stands out as a consistently recognized factor. Women with a history of having previously normal pregnancies do not generally have the same heightened risk. Thus, understanding the role of nulliparity in pre-eclampsia can help in identifying at-risk patients and implementing appropriate monitoring strategies during prenatal care.