This babycenter.com video shows pregnancy animation from the weeks 28th and 37th. A 3D animated look at baby development in the third trimester of pregnancy, including eyes opening, bones hardening, vernix caseosa shedding, and turning downward in preparation for birth. Video Transcript/nNarrator: You and your baby are beginning your last trimester together. At 28 weeks, your baby weighs just over 2 pounds. He'll more than triple his weight between now and birth, and build a layer of fat that will help keep him warm outside the womb. Your baby's skeleton is hardening. The bones in his head have not yet fused together, which will allow them to slightly overlap as his head passes through the snug space of the birth canal. Billions of neurons have developed and are firing in your baby's brain, creating essential connections that will help him learn in and outside the womb. Your baby can open his eyes now and see the light that filters through your womb. He can hear, too, so go ahead and talk or sing to your baby. As your due date nears, your baby will shed small bits of vernix caseosa, the white "cheesy" substance that covers his entire body and protects his skin from the amniotic fluid he's floating in. Your baby swallows some of these bits, along with other secretions, which pass through his digestive system to become his first bowel movement. At 37 weeks, your baby's skin is pink and soft. He's looking less like a wrinkled alien and more like a baby. He's gaining nearly one ounce a day and weighs about 6 pounds. He's now considered full-term. In preparation for birth, most babies will turn so their head is facing downward. Your baby will stay that way, head resting in your pelvic area, as he gets ready to greet the world.