Pre-eclampsia happens in pregnant women usually after 20 weeks of gestation. So what is Pre-Eclampsia? Pre-Eclampsia is the increased blood pressure and occurrence of protein in the urine, during pregnancy for the first time. Various organs of the mother can also be injured, like the eye, liver, Kidney, and brain. While some women may not show any symptoms, there may be some women who could show a few symptoms.