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Face and neck structures began to develop, as well as blood vessles and the heart. Lungs, stomache, and liver all develop near the end of the first 4 weeks. -
The sperm and egg meet, and fertilization happens. The cells begin to devide and the egg moves through the filopian tube into the uterus. The egg then attaches to the walls of the uterus. -
Fetus is now half an inch in size. Eyelids, ears, arms, legs, finger, and toes all begin to form. Fingers and toes become more long and defined. -
Fetus measures around 2 inches, and begans to make its own movements. Fetal heartbeat can be heard, as well as the sex of the fetus. -
Fetus now measures in at 4.3 to 4.6 inches. Heart and blood vessles are fully formed. Fetues is now able to blink , and has finger and toe prints. -
Fetus is 6 inches long is weighs about 10 ounces. Fetus is now able to suck its thumb, yawn, move, and make faces. -
The fetus weights around 2.6 pounds, and is now able to move positions quite often. Most premature babies are born around this stage of development. -
Fetus now weights around 1.4 pounds, and is able to respond to sounds. The inner ear is fully developed, which allows them to control balance and tell if they're upside down. -
On avarage the fetus is around 18.5 inches long and weights around 6 pounds. The brain is rapidly developed and the lungs as well as many other organs are maturing. -
Fetus weights almost 4 pounds, and between now and delivery will gain half its body weight. Fat layers began to form under the skin, leadin to fewer wrinkles on the fetuses body. -
The fetus is delivered at around the 40 week mark.