It totally depends on how big is your tummy. If it's not too big and you also didn't gain lot of weight, the earliest you can feel the movment is week 16.
我而家almost 18weeks. 16wks 2 days start feeling the movement....早兩日突然少jor...於是尋日立刻去做產檢..原來佢叭jor係到, but still kicking my back..that's why I can't feel it..hehe