Aortic aneurysm is a rare but potentially lethal complication during pregnancy. In this article we described a 30-year-old woman with a large size descending aorta aneurysm (11 cm in length and 5.6 cm in its greatest diameter), who had two term uncomplicated pregnancies. The patient received prophylactic ß-blocker drug during her second pregnancy. Both pregnancies were terminated by caesarean section without any serious complications. Postpartum period was recovered successfully, but a noticeable increase in aneurysm’s length was detected in the period between two pregnancies.