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Week 6
The baby's hands and feet are shaped like paddles, and her fingers are beginning to form even now. There's plenty going on inside the tiny body too. The heart has divided into the right and left chambers and is beating about 150 times a minute. That's roughly twice the rate of your heart -
Week 8
The baby's tiny tail is disappearing. So many changes have taken place that the baby has changed from an embryo and is now officially a fetus. This is the critical stage when your baby's organs are forming. -
Week 10
Vital organs — including his kidneys, intestines, brain, and liver (now making red blood cells in place of the disappearing yolk sac) — are in place and starting to function, though they'll continue to develop throughout your pregnancy. -
week 16
In the next few weeks, the baby will double his weight and add inches to his length. Right now, he's about the size of an avocado 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. -
week 30
A pint and a half of amniotic fluid surrounds it, but that volume will decrease as it gets bigger and takes up more room in your uterus. the eyesight continues to develop, though it's not very keen; even after its born, she'll keep its eyes closed for a good part of the day. -
week 35
kidneys are fully developed now, and its liver can process some waste products. Most of his basic physical development is now complete — its spend the next few weeks putting on weight. -
week 38
it has a firm grasp, which you'll soon be able to test when you hold its hand for the first time. its organs have matured and are ready for life outside the womb. -
Week 14
Thbaby's stretching out. From head to bottom, he measures about the size of a lemon. His body's growing faster than his head, which now sits upon a more distinct neck. By the end of this week, his arms will have grown to a length that's in proportion to the rest of his body. (His legs still have some lengthening to do.) 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 -
week 18
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. A protective covering of myelin is beginning to form around his nerves, a process that will continue for a year after he's born. -
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. These so-called breathing movements are also good practice for when he's born and takes that first gulp of air. And he's continuing to put on baby fat. babycenter.com
