Our little man shouldn't have much room to maneuver now that he's over 18 inches long and tips the scales at 5 1/4 pounds. But no matter how snug in my womb he gets, he still somehow manages to be doing somersaults. His kidneys are fully developed now, and his liver can process some waste products. Most of his basic physical development is now complete, including his skeleton. His brain development is going to be in overdrive the next few weeks. He's just going to keep getting bigger and stronger!