This is an image from an ultrasound, so it looks a little different, but you can see the baby pretty well. This is what an average baby looks like at 12 weeks. Little baby is fattening up. He/she doubled in weight over the past week and now weighs in at 14 grams. The liver has begun to function, and the vocal chords are beginning to form. Also, the baby is now about 2 inches long. Lots of other things are happening, too.