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Month 1
Size; At two weeks, the size of a pinhead.
Egg attaches to the lining of the uterus.
The critical stage for brain and spinal cord development.
Internal organs and circulatory system begin to form.
The heart begins to beat. -
Month 2
Size: About 1/4 inch
Face, eyes, ears, and limbs take shape.
Bones begin to form. -
First stage
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Month 3
Size: About 1 inch
Nostrils, moth, lips, and eyelids form.
Buds for all 20 baby teeth appear.
Fingers and toes are almost complete.
All organs are present but still immature. -
Month 4
Size: About 3 inches
Can suck its thumb, swallow, hiccup, and move around.
Facial features become clearer. -
Month 5
Size: About 6 1/2-7 inches
Teeth continue to develop.
Organs are maturing,
Becomes more active. -
Month 6
Size: About 8-10 inches
Fat deposits under the skin, but fetus appears wrinkled.
Breathing movements begin. -
Second stage
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Month 7
Size: About 10-12 inches
Has periods of activity followed by periods of rest and quiet. -
Month 8
Size: About 14-16 inches
Rapid weight gain continues.
May react to loud noises with a reflex jerking action. -
Third stage
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Month 9
Size: About 17-18 inches
Weight gain continues
Skin becomes smooth as fat deposits continue
Movements decrease as the fetus has room to move around
Acquires disease-fighting antibodies from the mother's blood
Descends into the pelvis, ready for birth