I am 7 months pregnant and I just had an u/s last week. I am trying for a VBAC after 3CS due to pre-term (8,7 and 6mths). Doc said that I may have a chance considering the length of time from last CS, size of baby and condition of pregnancy,especially if I carry full term. However, one concern that is making the possibility of VBAC doubtful is that my u/s showed my placenta to be low lying. What are my chances?