Hi Cindy,

Just had a look at my scan results and they are as follows:
19w1d scan - my cervix length was 4cm
33w2d scan - my cerix length was 3.1cm

So I would take it that it is normal for the cervix length to shorten.? Not sure why.?
And if your Obs is happy then I would try not to stress about it. Goodluck.

Diane