I felt flutters from about 15 weeks, like muscles twitching! It's more like little kicks now but not overly strong yet. I read somewhere that baby is rocked to sleep when you're more active with all the swooshing around in the amniotic fluid and when you stop they tend to waken. Not sure how true this is (reading a lot of rubbish these days). I definately notice it more when I'm sitting or lying down, probably not so many distractions either! So nice to feel though!!!!