In early pregnancy it can be hard to tell the difference, but baby movements (quickening) usually feel like light flutters, tiny taps, or a gentle “butterfly” sensation, while gas bubbles feel more like rolling, gurgling, or shifting pressure that may come with bloating and is often relieved after passing gas. Baby movements tend to be subtle at first and then become more rhythmic and localized, whereas gas is more random and related to digestion. Most women start feeling consistent fetal movements around 18–24 weeks, and by the third trimester they become stronger and more regular; you can track them by noticing patterns (like active times after meals or at night) and doing simple kick counts once movements are established to build confidence.