What will it feel like when my baby moves?

Baby Movement. Women have described the sensation as being like popcorn popping, a goldfish swimming around, or butterflies fluttering. You'll probably chalk up those first gentle taps or swishes in your belly to gas or hunger pains, but once you start feeling them more regularly, you'll recognize the difference. You're more likely to feel these early movements when you're sitting or lying quietly.
Butterflies. The first movements that you can feel begin around 18-20 weeks and feel like butterflies or fluttering. The karate kid movements come later. Towards the end of pregnancy, when there is not as much room, the movements become more of a rolling sensation.