24 weeks

How your baby's growing: Your baby's growing steadily, gaining about a quarter of a pound since last week, when she was just over a pound. Since she's over a foot long, that makes a pretty lean figure, but her body is filling out proportionally and she'll soon put on more baby fat. Your baby's skin is thin, translucent, and wrinkled, her brain is growing rapidly, and her taste buds are developing. Her lungs are developing "branches" of the respiratory "tree" and cells that produce surfactant, a substance that helps the air sacs inflate easily.