33 weeks pregnant

This week your baby weighs a little over 4 pounds and measures 17.2 inches. Thanks to his recent weight gain, he's losing that wrinkled alien look. Most of your baby's bones are hardening now, but his skull is still quite pliable. It's actually in separate pieces with spaces in between. This flexible structure allows your baby's head to compress so it can fit through your relatively narrow birth canal. His skull plates won't completely fuse until he's about 9 to 18 months old.