Your baby is around 8 inches (20.32 centimeters) long and weighs nearly 1 pound (453.6 grams) this week. He or she likes to practice sucking (either by sucking a thumb or just making the motion with his or her lips) and other reflex movements needed to survive after birth.
It may feel like there's a popcorn machine in your uterus this week, but it's just an energetic baby testing out of all his or her new parts. Typically this happens just as you lie down to go to sleep at night. (Remember last week, when you were wishing you would feel the baby move around some more?)
Your baby's eyelids work, and he or she can now differentiate between light and dark. Her fingernails and toenails are growing and may be long enough to reach the tips of her fingers and toes.
The baby is still covered in that waxy white stuff called vernix caseosa, and he or she also has eyelashes and might even have some hair on his or her head!
In fact, if you were to have a 4D ultrasound this week, you just might be able to start arguing over whether the little bundle of joy looks like you or your partner.