I had one at 7 weeks 3 days and it wasn't an internal one, though i had pretty much decided cos i was already a size 18 before getting pregnant that it would be internal and there was nothing i could do about it, but the sonnographer at babybond found it through normal means!! it looks very very small and like a white mass no outlines or anything like that just to warn you theres not much to see but it did pulse (hb).