Fundal height decreased at 39 weeks

Laura • 4 miscarriages, one living child, pregnant again.

I have always measured a week behind but today when the midwife measured she said it was 35.6. It was a midwife I haven't seen in awhile so I am not sure if she just didn't have it on my pubic bone or if I am suddenly smaller than I was last week.

Has anyone else experienced this? She didn't seem overly concerned. Just a few not sure what to think.

Thanks in advance!