The cause of preeclampsia is not fully understood and likely involves both fetal and maternal factors. Abnormal formation of the placenta (which is influenced by genetics, the environment, and the parent’s immune system) may play a central role in preeclampsia development. The placenta in people with preeclampsia often has narrow blood vessels that do not supply enough oxygen and nutrients to the placenta. In response, the parent’s body releases inflammatory cells and chemicals that can affect blood pressure and organs, causing damage.[1][2][3]