Your baby will gain weight faster than she'll increase in length. By now the baby's lungs and digestive tract are nearly mature. Your baby's irises can now dilate and contract in response to light. Due to the deposits of white fat underneath the skin your baby's skin is no longer red, but is now the wonderful newborn pink color. Her fingernails may reach the end of the hands, too. Your baby is now a little over 3 pounds and is 16 inches long.
You may worry if you are breathless from walking or sometimes even just sitting that your baby is in danger. This is not true. Your baby is getting plenty of oxygen from your placenta.
She is heading into a growth spurt. She can turn her head from side to side, and she's probably moving a lot, too, so you may have trouble sleeping because your baby's kicks and somersaults keep you up. Take comfort: All this moving is a sign that your baby is active and healthy.