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Week 6
This week's major developments: The nose, mouth, and ears that you'll spend so much time kissing in eight months are beginning to take shape
http://www.babycenter.com/6_your-pregnancy-6-weeks_1095.bc -
week 9
Your new resident is nearly an inch long — about the size of a grape — and weighs just a fraction of an ounce. She's starting to look more and more human. Her essential body parts are accounted for, though they'll go through plenty of fine-tuning in the coming months. Other changes abound: Your baby's heart finishes dividing into four chambers, and the valves start to form — as do her tiny teeth.http://www.babycenter.com/6_your-pregnancy-9-weeks_1098.bc -
Week 12
The most dramatic development this week: reflexes. Your baby's fingers will soon begin to open and close, his toes will curl, his eye muscles will clench, and his mouth will make sucking movements. In fact, if you prod your abdomen, your baby will squirm in response, although you won't be able to feel it.http://www.babycenter.com/6_your-pregnancy-12-weeks_1101.bc -
Week 15
Your growing baby now measures about 4 inches long, crown to rump, and weighs in at about 2 1/2 ounces (about the size of an apple). She's busy moving amniotic fluid through her nose and upper respiratory tract, which helps the primitive air sacs in her lungs begin to develop.http://www.babycenter.com/6_your-pregnancy-15-weeks_1104.bc -
Week 18
Head to rump, your baby is about 5 1/2 inches long (about the length of a bell pepper) and he weighs almost 7 ounces. He's busy flexing his arms and legs — movements that you'll start noticing more and more in the weeks ahead. His blood vessels are visible through his thin skin, and his ears are now in their final position, although they're still standing out from his head a bit. http://www.babycenter.com/6_your-pregnancy-18-weeks_1107.bc -
Week 23
Turn on the radio and sway to the music. With her sense of movement well developed by now, your baby can feel you dance. And now that she's more than 11 inches long and weighs just over a pound (about as much as a large mango), you may be able to see her squirm underneath your clothes. Blood vessels in her lungs are developing to prepare for breathing, and the sounds that your baby's increasingly keen ears pick up are preparing her for entry into the outside world.http://www.babycenter.com/6_you -
Week 26
The network of nerves in your baby's ears is better developed and more sensitive than before. He may now be able to hear both your voice and your partner's as you chat with each other. He's inhaling and exhaling small amounts of amniotic fluid, which is essential for the development of his lungs.http://www.babycenter.com/6_your-pregnancy-26-weeks_1115.bc -
Week 31
This week, your baby measures over 16 inches long. He weighs about 3.3 pounds (try carrying four navel oranges) and is heading into a growth spurt. He can turn his head from side to side, and his arms, legs, and body are beginning to plump out as needed fat accumulates underneath his skin. He's probably moving a lot, too, so you may have trouble sleeping because your baby's kicks and somersaults keep you up. Take comfort:http://www.babycenter.com/6_your-pregnancy-31-weeks_1120.bc -
Week 35
Your baby doesn't have much room to maneuver now that he's over 18 inches long and tips the scales at 5 1/4 pounds (pick up a honeydew melon). Because it's so snug in your womb, he isn't likely to be doing somersaults anymore, but the number of times he kicks should remain about the same. His kidneys are fully developed now, and his liver can process some waste products. http://www.babycenter.com/6_your-pregnancy-35-weeks_1124.bc -
Week 38
Hey, your little one isn't so little anymore, weighing close to seven pounds and measuring 20 inches long. Fetal development is nearly complete as your baby tends to a few last-minute details like shedding the skin-protecting vernix and lanugo. He's also producing more surfactant, a substance that prevents the air sacs in his lungs from sticking to one another once he starts to breathe. Most of the changes this week are small but important. http://www.whattoexpect.com/pregnancy/week-by-week/week
