Do you wonder what is going on inside of your body when you are pregnant? Do you wonder what the baby looks like, what it is doing, or what is happening with it right now? Below is information and pictures of the different stages of pregnancy, and a description of what is going on at each stage.

Day 21: The heart begins to beat

Day 28: The backbone and muscles are forming. Arms, legs, eyes, and ears have begun to show

Day 40: Brainwaves can be detected and recorded

Week 6

The liver is now taking over the production of blood cells and the brain begins to control movement of the muscles and organs. The mother is about to miss her second period and has probably confirmed that she is pregnant.

Week seven: The embryo begins to move spontaneously. The jaw forms, including teeth buds in the gums. Soon eyelids will seal to protect the embryo's developing light-sensitive eyes, and will reopen at about the seventh month.

Week 8

At little more than an inch long, the developing life is now called a fetus-Latin for "young one" or "offspring". Everything is now present that will be found in a fully developed adult. The heart has been beating for more than a month, the stomach produces digestive juices and the kidneys have begun to function. Forty muscle sets begin to operate in conjunction with the nervous system. The fetus' body responds to touch, although the mother will not be able to feel movement until the fourth or fifth month.

Week nine: Fingerprints are already evident in the skin. The fetus will curve its fingers around an object placed in the palm of its hand.

Week ten: The fetus can squint, swallow and wrinkle its forehead

Week 12

The fetus now sleeps, awakens and exercises its muscles energetically-turning its head, curling its toes, and opening and closing its mouth. The palm, when stroked, will make a tight fist. The fetus breathes amniotic fluid to help develop its respiratory system.

Week 16 & Week 18

By the end of this month (the 4th month), the fetus is eight to ten inches in length and weighs a half pound or more. The mother will probably start to "show" now. The ears are functioning, and there is evidence that the fetus hears quite a bit: the mother's voice and heartbeat, as well as external noises. The umbilical cord had become an engineering marvel, transporting 300 quarts of fluids per day and completing a round-trip of fluids every 30 seconds.

Week 20

Half the pregnancy has now passed, and the fetus is about 12 inches long. The mother has definitely begun to feel movement by now. If a sound is especially loud or startling, the fetus may jump in reaction to it.

Week 24

Oil and sweat glands are functioning. The delicate skin of the growing baby is protected from the fetal waters by a special ointment call "vernix". If the baby were born in this month and given the proper care, he would survive.

Seventh month: The baby now uses the four senses of vision, hearing, taste and touch. He can recognize his mother's voice.

Eighth month: The skin begins to thicken, with a layer of fat stored underneath for insulation and nourishment. Antibodies increasingly build up. The baby absorbs a gallon of amniotic fluid per day; the fluid is completely replaced every three hours.

Ninth month: Toward the end of this month, the baby is ready for birth. The average duration of pregnancy is 280 days from the first day of the mothers last menstrual period, but this varies. Most babies (85-95%) are born somewhere between 266 and 294 days. By this time the infant normally weighs 6-9 pounds, and his heart is pumping about 250 gallons of blood a day. He is fully capable of living outside of the womb.