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Your Changing Body Week-by-Week

From the time of conception until the time you give birth, your body is going to go through some major changes. Find out what to expect with our week-by-week look at your changing body.
Man putting his ear up to the woman?s tummy Week 16

Got butterflies in your belly? It could very well be your baby kicking! Most moms-to-be experience this major pregnancy milestone between their 16th and 20th weeks, but don't expect any big karate chops just yet. The first kicks, called quickening or flutters, are so subtle that they're often mistaken for stomach rumblings or indigestion -- and many first-timers may have a hard time detecting them initially.