Fetal Development Weeks 14 Through 17

Pat yourself and on the back -- and give your baby a pat, too! You've both reached the second trimester -- the so-called "honeymoon phase" of pregnancy. Your baby is growing by leaps and bounds, and so is your uterus, which is why you may be sporting a noticeable belly bump at this point, or at least finding that your clothes are tighter. At this point in your baby's development, expressions begin to flicker across her face -- little winces and grimaces. But this is simply a flexing of muscles, not an indication of mood. Mouth-muscle flexing is especially important: these sucking motions are your baby's most basic reflex and will enable her to eat.

Baby now weighs about an ounce, but by the end of this trimester at 28 weeks, it will top two pounds. It will from about three inches to a foot in length. (Keep in mind that all babies grow at different rates -- our figures are averages).