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4 Weeks
The fertilized egg immediately begins dividing and floats down into the uterus. Immediately upon fertilization your little one is set as a boy or a girl.The sex of your baby is predetermined by the fathers sperm chromosomes.
http://www.baby2see.com/development/week4.html -
8 Weeks
The embryo is measures about 18 mm (3/4 inch) in length.
Their arms and legs are growing and location of the elbows and toes are visible..The feet and hand buds have appeared.
Starts to practice moving (not felt by mom till week 20).The eyes can now be seen as small hollows on each side of the head.
http://www.baby2see.com/development/week8.html -
12 Weeks
The fetus is now about 2.5 inches (6cm) length and weighs about 0.7 ounce (20 g). The feet are almost half an inch(1cm) long.The fetus starts moving spontaneously. The face is beginning to look like a baby's face.•Fingernails and toenails appear.The baby can suck his thumb, and get hiccups.
http://www.baby2see.com/development/week12.html -
16 Weeks
The fetus measures nearly 5 inches (12cm) from head to buttocks.The fetus weighs about 3.5 ounces (100 grams).
The fetus is covered with a protective soft down to regulate its temperature.Fat begins to form underneath skin.
Baby hears external voices, sleeps and dreams.
http://www.baby2see.com/development/week16.html -
18 Weeks
•The fetus is now 6 inches long and weighs 7 ounces.
The fetus measures about 15cm and weighs almost 200 grams.They can hear sounds and may be startled by loud noises. Recognizable active and rest periods.
The skin is building a protective wax layer (vernix).
http://www.baby2see.com/development/week18.html -
23 Weeks
He or she measures over 28cm and weighs up to 550 grams.
The baby is over 11 inches tall, weighs about a pound.
The eyebrows are visible.
The child can successfully suck.
http://www.baby2see.com/development/week23.html -
26 Weeks
The baby measures 14 inches long and weighs over 1.7 pound.
Baby measures 35.5cm long and weighs over 760 grams.
The feet are 2 inches (5cm) long. Hands are very active.
The baby's eyes begin to open around this time.
http://www.baby2see.com/development/week26.html -
32 Weeks
The baby is 17 inches (43cm) long and weighs 4 pounds (1.8 kilograms).
The diameter of the head is almost 4 inches (10cm).
Under the skin the fat layer is getting thicker.
The toenails and fingernails are completely formed.
In boys, the testicles will be descending from the groin down into his scrotum.
http://www.baby2see.com/development/week32.html -
36 Weeks
The baby is about 19 inches (48 cm) long.
Weight is around 6 pounds (2.7 kg).
The baby's body is becoming chubby as fat layers build.
Between now and birth they may gain about an ounce (30g) a day
You may feel contractions of the womb, called Braxton Hicks contractions.
http://www.baby2see.com/development/week36.html -
40 Weeks
You have now reached the time of delivery.
All systems are developed and ready to go.
Now it is just a matter of time.
Baby is about 20 inches (51cm) and weighs approximately 7.5 pounds (3.5 kg).
The head has a diameter of about 4 inches (10 cm).
The contractions could begin at any moment.
http://www.baby2see.com/development/week40.html
