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Week 7
The babies' hands and feet are forming. The baby is about half an inch long. Technically, your baby is still considered an embryo and has something of a small tail, which is an extension of her tailbone.
http://www.babycenter.com/6_your-pregnancy-7-weeks_1096.bc -
Week 9
Your baby's organs, muscles, and nerves are kicking into gear. Your baby weighs about a fraction of an ounce. Her eyes are fully formed, but her eyelids are fused shut and won't open until 27 weeks. She has tiny earlobes, and her mouth, nose, and nostrils are more distinct.
http://www.babycenter.com/6_your-pregnancy-9-weeks_1098.bc -
Week 11
Your baby is already busy kicking and stretching. The baby is almost fully formed. Some of the babies bones are beginning to harden.
http://www.babycenter.com/6_your-pregnancy-11-weeks_1100.bc -
Week 15
Your baby is about 4 inches long. There's not much for your baby to taste at this point, but she is forming taste buds. You can find the sex of your baby now.
http://www.babycenter.com/303_15-weeks_1615702.bc -
Week 20
Your baby weighs about 10 1/2 ounces now. It's also producing meconium, a black, sticky by-product of digestion. Your baby is also starting to swallow.
http://www.babycenter.com/303_20-weeks_1615705.bc -
Week 23
Your baby is more than 11 inches long and weighs just over a pound. His skin is red and wrinkled. Blood vessels in his lungs are developing to prepare him for breathing.
http://www.babycenter.com/303_23-weeks_1615708.bc -
Week 28
This is the first day of the thrid trimester. With her eyesight developing, she may be able to see the light that filters in through your womb. Your babies' also developing billions of neurons in her brain and adding more body fat in preparation for life in the outside world.
http://www.babycenter.com/6_your-pregnancy-28-weeks_1117.bc -
Week 32
By now, your baby weighs 3.75 pounds and is about 16.7 inches long. Your baby now has toenails, fingernails, and real hair. Their skin is becoming soft and smooth as she plumps up in preparation for birth.
http://www.babycenter.com/6_your-pregnancy-32-weeks_1121.bc -
Week 33
This week your baby weighs a little over 4 pounds. The bones in his skull aren't fused together, which allows them to move and slightly overlap, thus making it easier for him to fit through the birth canal. These bones don't entirely fuse until early adulthood, so they can grow as his brain and other tissue expands during infancy and childhood.
http://www.babycenter.com/6_your-pregnancy-33-weeks_1122.bc -
Week 40
It's hard to say for sure how big your baby will be, but the average newborn weighs about 7 1/2 pounds (a small pumpkin) and is about 20 inches long. Your babies head may look a little coneshaped when you give birth. Your babies skull bones are still not fused together yet.
http://www.babycenter.com/6_your-pregnancy-40-weeks_1129.bc
