I'm pregnant with my fourth and have never seen it
I'm 32 weeks and have never seen it :)
That was throughout 3rd trimester
2nd baby and I never did. I could definitely see where its spine was when it rolled over and could feel a lump where a foot was.
I remember seeing mines at 6 7 months I think but it looks and feels funny. I would be able to see it over my shirt lol