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4 weeks
All of the baby's organs and body parts will develop from the two layers of cells that now make up the embryo. http://www.babycenter.com/fetal-development-images-4-weeks -
7 weeks
Eyelids partilly cover the babies eyes. A loop of your babies growing intestines is bulging into the umbilical cord. What looks like a tail is actually an extension of your babies tailbone. It will disappear in the next few weeks.
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11 weeks
The babies skin is still transparent, allowing blood vessels to show through. The baby may soon be able to open and close his fist. The babies bones are begginning to harden and tiny tooth buds are starting to appear under his gum. http://www.babycenter.com/fetal-development-images-11-weeks -
14 weeks
The babies arms have lengthen. Thanks to brain inpulses, the babies facial muscles are getting a workout as she squints, frowns, and grimaces. The baby is starting to develop an ultra-fine downy covering of hair all over the body, this is called laguno.
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17 weeks
The baby's umbilical cord is growing stronger and thicker. The baby's sense of hearing is developing. The baby can move all his/her joints. The skeleton is turning from rubbery cartilage into hardened bones.
http://www.babycenter.com/fetal-development-images-17-weeks
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21 weeks
The babies eyelids and eyeborws are fully developed.
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30 weeks
Your baby is ablle to distinguish between light and dark. At birth the baby's vision would be about 20/400, which means she can make out objects a few inches from her face. http://www.babycenter.com/fetal-development-images-30-weeks -
34
Your baby's lungs are well developed. Your baby's layer of fat is filling out. She'll need them to rgulate her body temparature once shes born. http://www.babycenter.com/fetal-development-images-34-weeks -
36 weeks
The baby is probably in a head down postition right now, which is optimal for a smooth delivery. Your baby is shedding most of her downy hair as well as some of the vernix caseosa, the creamy substance the prevents the skin. http://www.babycenter.com/fetal-development-images-36-weeks -
38 weeks
The baby has a firm grasp at his hands. At 38 weeks pregnant, your baby may weigh anywhere between 6 and 7 pounds. http://www.babycenter.com/fetal-development-images-38-weeks
