24 weeks

Your baby is as long as an ear of corn, and she now notices bright lights and may move in response.
Baby's Length: 11.81 in.
Baby's Weight: 1.32 lb.
You might notice that your baby is very busy during the next few weeks. Right now she's small enough to have plenty of room to move and groove in your belly. She may even respond to your soothing voice or the rubbing of your belly by calming down, while loud sounds or a tap on your belly could cause her to become alert. Also, because the balance-controlling inner ear has developed, your baby can finally tell if she's upside down or right side up, so moving around takes on new meaning.