Its skin is very thin. Blood vessels can be seen through the skin at this point in its development. Fine hair called lanugo hair covers the baby's body. By this time, your baby may be sucking its thumb. This has been seen with ultrasound examination.
Eyes continue to move to the front of the face but are still widely separated.
Ears continue to develop externally. As you can see in the illustration on page 132, they now look more like normal ears. In fact, your baby looks more human all the time. If an X-ray were performed at this time, the baby's skeleton would be visible. The levels of these three chemicals in your blood may indicate the presence of Down syndrome.