Our little man now weighs somewhere around 5 pounds and is almost 18 inches long. His fat layers – which will help regulate his body temperature once he's born – are filling him out, making him rounder. His central nervous system is maturing, his immune system is strengthening, his brain is rapidly developing, and his lungs are continuing to mature as well. His eyes can now detect light and his pupils dilate and constrict. He gets the hiccups daily and loves playing footsie!!