At this point, the amniotic fluid is at the highest level in the pregnancy. The amount will remain constant until delivery. Rapid brain growth has increased the baby's head size approximately 3/8 of an inch this week. Fat continues to accumulate which turns the baby's skin color from red to pink.
He's rapidly losing that wrinkled, alien look and his skeleton is hardening. The bones in his skull aren't fused together, which allows them to move and slightly overlap, thus making it easier for him to fit through the birth canal. (The pressure on the head during birth is so intense that many babies are born with a cone head-like appearance.) These bones don't entirely fuse until early adulthood, so they can grow as his brain and other tissue expands during infancy and childhood
As your baby fills out even more of your belly, lots of things might start to change: Whereas before you were sashaying, you may find yourself waddling. Finding an easy position to sit in let alone sleep, is becoming more of a challenge.
You may be feeling some achiness and even numbness in your fingers, wrists, and hands. Like many other tissues in your body, those in your wrist can retain fluid, which can increase pressure in the carpal tunnel, a bony canal in your wrist
Nerves that run through this "tunnel" may end up pinched, creating numbness; tingling, shooting or burning pain; or a dull ache. Try wearing a splint to stabilize your wrist or propping your arm up with a pillow when you sleep. If your work requires repetitive hand movements (at a keyboard, for instance), remember to stretch your hands when you take breaks, which should be frequently.
Many women are still feeling sexy at this stage and their partners often agree. You may need to make some adjustments, but for most women, sex during pregnancy is fine right up until their water breaks or their labor starts.