How early did you feel movement with your second baby?

Kassandra • #2 due 6/18/15
I felt my son move (distinctly) at 18weeks. His placenta was in the front. With this baby, the placenta is in the back and doc said I may feel movement sooner, because of the location of the placenta and being my second baby. I SWEAR I felt flutters on Saturday @ 12w3d. And have felt it since. Just curious to see what others have experienced.