29 weeks and your baby is about 2 ¾ pounds and a little over 15 inches long. They are adding
more fat and muscles and strengthening their bones. The fingernails and toenails are fully formed and
on the black and white 2D ultrasound you may see enough hair on the baby’s head, that it floats around
in the fluid. If they have a lot of hair, it will look like bumps and ridges on the color ultrasound. The main
things happening at this stage are the lungs continuing to develop and the fat is increasing. Sometimes
on the color ultrasound you can already see the beginning of some fat rolls and sometimes a double
chin.
