Hi, I`ve just been to my 34 weeks scan and on the report is is saying that placenta position is posterior. the leading edge is 5.2 cm from internal os. Is that ok? the midwife that is ok and i can have a natural, vaginal birth. I`m worried as at 20 weeks scan they said the placenta was low , 2 cm from the os. But now is 5.2 cm, hope this is better.