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Week 7
She's generating about one hundred new brain cells each minute! Not only is her brain becoming more complex, but her heart is too. Also important: She's developing a permanent set of kidneys Her arm and leg joints are now forming. http://pregnant.thebump.com/pregnancy-week-by-week/7-weeks-pregnant.aspx -
Week 10
This week, your baby measures about 1 1/2 inches from top to bottom--about as big as a cocktail shrimp and similar in shape. Tooth buds are forming, bones are growing, and hair is starting to sprout
www.parenting.com/timeline/1st-trimester-week-10 -
Week 12
As your baby's muscles start to bulk up at this stage, he's getting busy stretching and kicking. When you put your hand on your belly, your baby will likely wiggle in response because his reflexes are starting to develop -- though it's too early to feel his movements.
http://www.babycenter.com/6_your-pregnancy-12-weeks_1101.bc -
Week 16
your baby will double his weight and add inches to his length. Right now, he's about the size of an avocado: 4 1/2 inches long (head to rump) and 3 1/2 ounces. His legs are much more developed, his head is more erect than it has been, and his eyes have moved closer to the front of his head.
http://www.babycenter.com/6_your-pregnancy-16-weeks_1105.bc -
Week 18
Head to rump, your baby is about 5 1/2 inches long 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.
http://www.babycenter.com/6_your-pregnancy-18-weeks_1107.bc -
Week 22
At 11 inches and almost 1 pound, your baby is starting to look like a miniature newborn. His lips, eyelids, and eyebrows are becoming more distinct, and he's even developing tiny tooth buds beneath his gums. His eyes have formed, but his irises still lack pigment.
http://www.babycenter.com/6_your-pregnancy-22-weeks_1111.bc -
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 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 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.
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. 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. Most of his basic physical development is now complete — he'll spend the next few weeks putting on weight.
http://www.babycenter.com/6_your-pregnancy-35 -
Week 37
Your baby is now considered "full term," even though your due date is three weeks away. If you go into labor now, his lungs will likely be mature enough to fully adjust to life outside the womb.
http://www.babycenter.com/6_your-pregnancy-37-weeks_1126.bc
