I am 33 years old and 38 weeks pregnant with my 4th child, I had an ultrasound this morning and they detected an enlarged vein between his liver and bladder. Doctor said it may be an aneurism. I am going back Monday to have her check it again, she said if it is still there, she will refer me to specialist. Now that I am home, I am wondering if it is a good idea to wait til Monday. also what causes an aneurism in fetus ? How will they repair or treat this and should I go ahead and be induced to get treatment started, he weighs at least 7 lbs now and is very plump, even fatrolls on his ankles.