Ferrals thats so funny as I just logged back in now I'm feeling a little more awake and still couldn't find it! Are you wanting to know how far away it has to be for a natural birth? If so I don't know. I'm also not working for a week so I can't ask the Ob. I can ask them when I return to work. I do remember caring for a woman with a low lying placenta who was trying for a natural birth (it must of been on the margin of is it to low or not) and she did birth vaginally although I was nervous about the blood loss. It wasn't much but it was fresh and started when she was about 3cm. Fortunately she birthed quickly with no problems but I do remember there was fresh bleeding when we usually don't see it. Probably only 100mls until birth. By memory it was a few cms from the internal os but I don't remember how many.