Fundal height/measurements, how are they supposed to work?

[Charlotte91]

Well, for me, DD never moved. I also had low fluid. I was 33 weeks and measured at 24.

And bub was 30 weeks in size,

I wouldn't be too worried.

[MummaSue]

My measurements were always under. And I had a relatively large baby (for my frame I mean, she wasn't massive - 4kg).

I think they're a load of old rubbish but am sure there is a reason they still do them

[MummyOfTerrors]

ive always measured 3 to 4 weeks under and last check bubs was transvere so she really couldnt measure me
and i have big babies
mainly its just a rough check
i think its more if your measurements dont change or change dramatically which then they will do an U/S