I have been told that I may have this - I am almost 30 weeks pregnant. it seems to have consequences for the rest of the pregnancy and for labour and delivery - with the possibility of having to have a CS or at least an epidural immediately upon starting labour to alleviate the pressure on the aorta caused by blood pressure rises and falls during contractions. Are there any other MNers out there with a definite or possible Marfans diagnosis? What difference is it making to labour/birth for you?