Pre-eclampsia is new high blood pressure that happens during pregnancy. It usually occurs after 20 weeks of pregnancy. It affects the kidneys, liver, brain, and placenta. It can cause a headache that won't go away, vision problems, belly pain, and swollen hands and face.

Pre-eclampsia can be treated with medicine and close monitoring. If not treated, it can be deadly for the mother and baby.

Pre-eclampsia usually goes away after the baby is born. But symptoms may last a few weeks or more and can get worse after delivery. Rarely, symptoms of pre-eclampsia don't show up until days or even weeks after childbirth.