At 39 weeks I am measuring 35-36 weeks. But midwife says at this late in the game that is irrelevant. A couple of weeks ago I measured @ 37 cm. So I think a lot of it now has to do with baby positioning.
I agree with that comment about baby position. At 37 weeks, I measured 40 cm, and then last week, at about 38.5 weeks, I measured only 37 cms. Oh, and when I got that 40 cm measurement, I was also having a contraction. I think that made my belly pop out more.
I'm 39 weeks as of yesterday and I measured 38.5 weeks at my MW appt. I measured 38 weeks the appt before (and have been pretty much been right on track within a cm or so since 30 weeks) and the MW said he's engaged even farther so thats probably why there wasn't such an increase like normal.
I'm 39 weeks today, measured 37 cm (also today). I've been measuring 36 cm the past three weeks though. Plus, I'm in the same boat as some pp, you can see his back and bum sticking out at an angle a lot of the time, so measuring across the middle doesn't really account for all of him