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Period: to
Pregnancy
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First Month Size
The fetus is roughly the size of a pinhead. -
First Month Organs
The brain, spinal cord, internal organs, and circulatory system are developing at this stage. -
First Month Embryo
The lining of the uterus and the egg are now attached. -
Second Month Size
At this stage, the baby is now roughly a quarter inch in size. -
Second Month Organs
The bones begin development as the limbs, eyes, ears, and face take shape. -
Second Month Embryo
The embryo is still attached to the wall of the uterus. -
Third Month Size
The baby is now an inch long. -
Third Month Organs
The lips, mouth, eyelids, and nostrils now form, as the buds for the teeth also begin to appear. -
Third Month Fetus
At this point the fetus is no longer attached to the uterus wall. -
Fourth Month Size
The fetus is now roughly 1 ounce and 3 inches long. -
Fourth Month Organs
Facial features begin to appear. -
Fourth Month Fetus
It can now move around, swallow hiccup and suck its thumb. -
Fifth Month Size
Fetus now weighs 4-5 ounces and is 6.5-7 inches long. -
Fifth Month Organs
The organs mature as the eyelashes, eyebrows, and hair appear. The teeth also continue growing. -
Fifth Month Fetus
The fetus now becomes more active. -
Sixth Month Size
It is now 8-12 ounces and 8-10 inches long. -
Sixth Month Organs
Fat begins forming under the skin. -
Sixth Month Fetus
The fetus looks wrinkled and breathing begins. -
Seventh Month Size
It is now 1.5 - 2 pounds and 10 - 12 inches long. -
Seventh Month Organs
Organs have almost fully matured. -
Seventh Month Fetus
Has periods of both intermittent rest and activity. -
Eighth Month Size
It is now 14 - 16 inches long and weighs 2.5 - 3 pounds. -
Eighth Month Organs
Organs are now almost fully mature. -
Eighth Month Fetus
It now gains weight rapidly, can react to loud noises, and goes into a head-down or fetal position. -
Ninth Month Size
It is now 5 - 6 pounds and 17 - 18 inches long. -
Ninth Month Organs
Continues to gain weight and the skin becomes smoother. -
Ninth Month Fetus
Descends into pelvis, reduces movement due to lack of room, and obtains the mother's antibodies for fighting disease.