Rupture of a splenic artery aneurysm in the first trimester of pregnancy.

Background: Rupture of a splenic artery aneurysm during pregnancy is a rare and serious event, occurring mainly during the third trimester. The risk of rupture for an existing splenic artery aneurysm is very high during pregnancy (from 20% to 50%). When it does rupture, the maternal mortality rate is around 75% and the fetal mortality rate 95%.