June 20, 2010
14 weeks: lemon
Your baby's body systems are starting to work on their own. The digestive system practices moving food along the intestines and through the renal system and he can create and eliminate urine. He also continues to practice breathing the amniotic fluid in and out of his lungs. Your baby has tiny, soft nails on his fingers and toes, is growing hair and may even suck his thumb. Your baby is approximately 3 1/2 - 4 inches and weighs approximately 1.5 ounces.
Also, your baby's blood is beginning to form in the bone marrow and blood vessels are beginning to connect various parts of the fetus to another. The joints and muscles allow your baby full body movement so your baby is able to move around. The baby's neck is getting longer and his chin is no longer resting on his chest. The eyes and ears continue to move into place. The hands are becoming functional and reflex movements often occur. Nourishment now comes from the placenta.
This week's big developments: Your baby can now squint, frown, grimace, pee, and possibly suck his thumb! Thanks to brain impulses, his facial muscles are getting a workout as his tiny features form one expression after another. He can grasp, too, and if you're having an ultrasound now, you may even catch him sucking his thumb.
He's starting to develop an ultra-fine, downy covering of hair, called lanugo, all over his body. Your baby's liver starts making bile this week — a sign that it's doing its job right — and his spleen starts helping in the production of red blood cells. Though you can't feel his tiny punches and kicks yet, your little pugilist's hands and feet (which now measure about 1/2 inch long) are more flexible and active.