Our baby now weighs about 5 lbs and is almost 18 inches long. (Think bag of sugar.) Articles say he will gain about 2 more lbs in the next 6 wks! His fat layers — which will help regulate his body temperature once he's born — are filling him out, making him rounder. (Why is it that we only think fat is cute on babies????) Lil Arroyo's skin is also smoother than ever. His central nervous system is maturing and his lungs are continuing to mature as well.
Now that his brain has formed billions of neurons, it must accomplish the even more complex feat of hooking the neurons and synapses together. The brain is forming trillions of connections, making it possible for him to learn in the womb. All of this brain development may be the reason that Lil Arroyo sleeps frequently at this stage. He may even be dreaming—his eyes dart around rapidly just as an adult's might in REM sleep. (Too bad we don't have a camera in there to watch him!)
INTERESTING FACT: Our child's development is in no way complete at birth. In the first year after birth, a baby's brain triples in size and becomes three-quarters of its adult size.