What happens if rubella occurs during pregnancy?
The most serious complication of rubella is congenital rubella. It occurs when a pregnant woman contracts the virus and passes it on to her unborn child. The child is then at risk of dying in the womb, or developing serious birth defects. There is up to a 90% chance of congenital rubella if the mother is infected with the virus either during the first 20 weeks, or possibly just prior to conception. If the mother catches the disease later in the pregnancy, the baby is less likely to get it.