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First Month
By the end of the two weeks, the fertilized egg is about the size of a pin head. The heart, which is no larger than a poppy seed, has begun beating. The egg has attached itself to the lining of the uterus. -
Second Month
The zygote is about 1/4 inch long and has distinct, slightly webbed fingers. Face, eyes ears and limbs have developed. Veins are clearly visible. The heart has divided into right and left chambers. Zygote changes into an embryo at the end of eight weeks. -
Third Month
By now the fetus is 1 inch long and is fully formed. He/she has begun swallowing and kicking. All organs and muscles have formed and are beginning to function. -
Fourth Month
Baby is covered with a layer of thick, downy hair called lanugo. His/her heartbeat can be heard clearly. This is when the mother may feel baby's first kick. Size: about 3 inches long. -
Fifth Month
A protective coating called vernix caseosa begins to form on baby's skin. At this time the baby is about 6 ½-7 inches long and weighs almost 4-5 ounces. -
Sixth Month
Eyebrows and eyelids are visible. The baby's lungs are filled with amniotic fluid, and he/she has started breathing motions. If the mother talks or sings, the baby can hear. 8-10 inches, about 8-12 ounces. -
Seventh Month
At the beginning of the seventh month, the baby weighs about 1 ½ pounds and is about 14-16 inches long. His/her body is well-formed. Fingernails cover the fingertips. -
Eighth Month
Baby is gaining about half a pound per week, and layers of fat are piling on. He/she has probably turned head-down in preparation for birth. He/she weighs between 2 1/2 and 3 pounds. -
Ninth Month
Baby is a hefty 5 to 6 pounds and measures between 17 and 18 inches. As he/she becomes more crowded, the mother may feel baby move around less.
