Hi,

I had the same thing when i was at the same stage except placenta was 2cms from cervix. usually it moves away and its all good. she'll just have another scan closer to her EDD. Also my sister had the same problem except her placenta was completely covering the cervix (level 4 placenta previa). Hers didnt end up moving away & she had a fair bit of problems like bleeding etc. so her bub was delivered by c/s.

hope that helps