Your baby-on-the-way is now about the size of a lime and by the end of this week 12, your baby will weigh close to 14 grams. Your baby is about the size of half a banana! Now that your baby’s chin and nose are complete, your baby’s face has a profile. This week, your little one’s eyes (which started out on the sides of his or her head) have continued their migration and now have moved much closer together, making your baby look more like a newborn human.
Your baby’s face is becoming more and more animated as the weeks go by. Your baby can make facial expressions such as squinting, frowning and grimacing. The facial muscles also allow your baby to pout and open and close his or her jaws. Opening and closing the mouth is a new thing for your little one to practice. Can you believe your baby is already starting the rooting reflex? Incredible!
The brain is continuing to develop. This development lets your baby move about inside your womb. Researchers believe movements correspond to the development of impulses in the brain. Your baby’s nerve cells have been multiplying and right about now, the neurological impulses in his or her brain are forming. Your baby is also developing quite a few muscles now as well. Your baby is bending his or her arms, rotating wrists and bending legs.
Your little one can already respond to touch, because of all the many reflexes he or she is acquiring. Fingers respond to the palms being touched by closing into a fist, toes respond to the soles of the feet being touched by curling down and eye lid muscles respond to the eyelids being touched by clenching. Your baby also has the ability to feel pain now.
By this week, your baby is swallowing the fluids around him or her and discharging fluids into the amniotic sac. This means your baby’s first urine is made and since the digestive system is starting to function, it is capable of producing contractions that push food through the bowels. Your baby is passing urine for the very first time, although you probably won’t be changing your first wet diaper for another 28 weeks or so (that is, if your baby stays in there until your due date). Don’t worry, your baby’s environment stays fresh and clean, because the amniotic fluid your baby is surrounded by (with is up to about one and a half ounces by now) is completely replaced about every 3 hours.