Yes it is a bit strange I only know of the 12 and 20 week scan and they may do a scan later to check growth or breech position. I'd love to be kept updated if you don't mind. I'm sure it'll all be fine. It may just be to ease your anxiety over movement?

Thank you @jumpingjellybeans when I asked if everything ok with the baby midwife just said it's a normal procedure in the late pregnancy. As far as I know the scan only needed if they think there are some complications. Well I'm on my way there now :-( see how it goes x

I had one during my first pregnancy but it was to see whether baby was breech. It could be for the same reason or a sizing check perhaps??