-
Week 13
Your fetus is about three inches long and the size of a peach at 13 weeks pregnant. But don't compare your fetus with the fetus next door. Starting about now, babies begin growing at different paces, some faster than others, some more slowly, though they all follow the same developmental path. Growing at a universally breakneck speed now is your baby's body as it tries to catch up to the head in terms of size. Your baby's head is about half of it's own body.
http://www.whattoexpect.com/pregnancy -
Week 15
Your baby is growing bigger each week — he or she is as long as four and a half inches right now. They're about the size of a large navel orange, at this stage. But because your baby weighs so little (a bit over two ounces), you won't feel the calisthenics going on inside your abdominal gym. But don't let that fool you. Your fetus is holding daily aerobics classes — kicking, curling toes, and moving those little arms and legs.
http://www.whattoexpect.com/pregnancy/your-baby/week-15/kick-and-cu -
Week 16
At 16 weeks you can almost see through the fetal skin, and a very fine growth of hair called lanugo is forming on the head. Muscles and bones are coming together to form the skeletal system. The fetus starts to move and make sucking motions with its mouth. The liver and pancreas have formed, and the intestines have started to make the first bowel movement, called the meconium.
http://www.everydayhealth.com/pregnancy-pictures/fetal-development.aspx#/slide-8 -
Week 17
The baby's body fat is beginning to form and will continue to accumulate through the end of your pregnancy. By the time your baby is born, body fat will make up about two-thirds of his or her weight. Your baby is almost certainly listening up by now. In fact, loud noises will startle the baby and also get him used to them.
http://www.whattoexpect.com/pregnancy/your-baby/week-17/rehearsal-dinner.asp -
Week 18
At 18 weeks pregnant, your baby is hitting the height chart at five and a half inches long (remember, that's crown to rump) and weighs about five ounces.Nerves, now covered with a substance called myelin (which speeds messages from nerve cell to nerve cell), are forming more complex connections. And those in the brain are further specializing into the ones that serve the senses of touch, taste, smell, sight, and hearing.
http://www.whattoexpect.com/pregnancy/your-baby/week-18/nerves.aspx -
Week 19
Your little action figure is able to choreograph Matrix-like moves at 19 weeks pregnant. Arms and legs are finally in proportion, neurons are now connected between the brain and muscles, and cartilage throughout the body is turning to bone. All these upgrades combine to give your baby more control over limb movements.
http://www.whattoexpect.com/pregnancy/your-baby/week-19/greasy-stuff.aspx -
week 21
Your baby now weighs about three-quarters of a pound and is approximately 10 1/2 inches long. In other developments, your baby's eyebrows and lids are present now, and if you're having a girl, her vagina has begun to form as well.. You're probably feeling pretty comfortable these days. You're not too big yet, and the usual discomforts associated with early pregnancy are, for the most part, gone. If you're feeling good, relax and enjoy it while you can.
http://www.whattoexpect.com/pregnancy/your- -
week 27
This is the last week of the second trimester of your pregnancy. Beginning somewhere around this stage of pregnancy, nearly three-quarters of pregnant women start to experience mild swelling of the extremities, particularly of the feet and ankles.
http://www.whattoexpect.com/pregnancy/your-body/week-27/edema.aspx -
week 30
Only 10 more weeks until your baby arrives. You may begin noticing that you become tired easily during this last part of pregnancy. This may be especially true if you are having difficulty sleeping at night. Your body is producing a number of different hormones that can cause your joints to become looser. This may result in your feet actually getting larger.
http://www.whattoexpect.com/pregnancy/your-baby/week-30/headway.aspx -
week 38
Now, 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. Just as your baby is preparing for life outside the womb, your body is tending to its own final touches before the big day.
http://www.whattoexpect.com/pregnancy/your-body/week-38/colostrum.aspx
