Hello, I am 27 weeks pregnant and my abdominal ultrasound shows a low lying posterior placenta, 1 cm from internal os. What is the chance that I ll have a normal delivery? I am really worried. What are the chances that the position will be correct at delivery time and by when can it be confirmed, I mean when should I get an ultrasound done next. FYI, this is my second delivery, the first one was a normal one. Thanks a lot.