Every expecting mother-to-be waits anxiously for the first signs of movement in her stomach. To some women, it feels like small bubbles rising to the surface. Others report that it feels similar to the pop of popcorn. Still others compare it to the fluttering of butterflies. Known as “quickening,” these first sensations usually signal the beginning of a string of motions that grow in regularity until childbirth. In this article, we’ll describe what to expect when your baby makes his first moves. Whether a light tap, a swift kick, or a little twist, it’s one of the exciting delights of being pregnant.