Hiya
I have had an anterior placenta with all three pregnancies and felt all babies moving around 19wks - then DH can see and feel bubs moving around 24-25wks. I think the only difference from what I have been told by people with posterior placenta is that the movement is in different places - sort of really low or really high, rather than around the belly button.

Hope that makes sense - having an anterior placenta does not indicate a low lying placenta. My sister had a posterior low lying placenta.

Take care and congrats.
Tess.