This has happened a few times now, but I swear I can see her "breathe" in there sometimes. It's rhythmical, and varies a little between being every second to a bit less (so maybe 45-50 times a min).
It's not me...it's happening if I hold me breath...and not being able to stop my pulse readily and it being totally different rates I don't think it's anything to do with me, but, well, there's doubt.
I'm 39+6, but she still wriggles a lot...DH has witnessed it occasionally. Didn't happen that I could see when she was OP. But my girly's gone LOA again (phew) and it's happening again...on the left...it's such a nice feeling.
...could this be her practicing breathing?