25 weeks

In the round. "My body fills out a little every day." Your baby measures 12 to 13 inches and weighs about 1.5 pounds. Her skin is still thin, wrinkled, and pale, but she gets a bit plumper every day, thanks to the fat and muscle she's continually adding. Right now tiny blood vessels called capillaries are starting to develop below your little one's skin, and these will give it a pink hue. And she's still swallowing amniotic fluid. Too bad it doesn't come in different flavors!

Brain gain. The brain's cortex is developing into layers. Most of the action is still controlled by other brain areas that developed much earlier. The human cerebral cortex is the most elaborate brain structure in all the animal kingdom, giving us the ability to think, plan, and feel in complex ways.

The Thinker The baby strikes a thoughtful pose, much like the famous sculpture by Rodin. He's got plenty to mull over as he takes in the sounds, tastes, and sensations of the watery world around him.