I'm 20 weeks with my first and felt her move at just over 18 weeks. Just a few erratic feelings one night like little pops or pockets of air right near the surface of my skin. When I put my hand to the surface I could feel it. Then I felt nothing for almost a week then there it was again and since I've felt just a few every day. Hubby can feel it too with his hands.

I have an anterior placenta.

The feeling is not dissimilar to wind moving through my system but it was different enough for me to 'know' it was baby. The main difference was that it feels like it's just under the surface of the skin unlike wind which to me always feels deep down. Also it tends to be specific to a location, not bubbling along like wind does.