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First Month
Size: At two weeks, the size of a pin head.
Egg attaches to lining of the uterus.
Critical stage for the brain and spinal cord development.
Internal organs and circulatory system begins to from.
The heart begins to beat. -
Second Month
Size: About 1/4 inch (6 mm) long as month begins.
Face, eyes, ears, and limbs take shape.
Bones begin to form. -
Third Month
Size: About 1 inch (25 mm) long as month begins,
Nostrils, mouth, lips, and eyelids, form.
Buds for all 20 baby teeth appear.
Fingers and toes almost complete.
All organs present but still immature. -
Fourth Month
Size: About 3 inches (7.6 cm) long, weighs 1 ounce (28 grams) as month begins.
Can suck its thumb, hiccup, swallow, and move around.
Facial features become clearer. -
Fifth Month
Size: About 6 1/2-7 inches (16-18 cm) long, weighs about 4-5 ounces (113-142 grams) as month begins.
Hair, eyelashes, and eyebrows appear.
Teeth continue to develop.
Organs are maturing.
Becomes more active. -
Sixth Month
Size: About 8-10 inches (21-25 cm) long, weighs about 8-12 ounces (227-340 grams) as month begins.
Fat deposits under skin, but fetus appears wrinkled.
Breathing movements begin. -
Seventh Month
Size: About 10-12 in (25-31 cm) long, weighs about 1 1/2 pounds (680-907 grams) as month begins.
Has periods of activity followed by periods of rest and quiet. -
Eighth Month
Size: About 14-16 inches (36-41 cm) long, weighs about 2 1/2- 3 pounds (1-1.4 kg) as month begins.
Rapid weight gain continues.
May react to loud noises with reflex jerking action.
Moves into head-down position. -
Ninth Month
Size: About 17-18 inches (43-46 cm) long, weighs about 5-6 pounds (2.3-2.7 kg) as month begins.
Weight gain continues.
Skin becomes smooth as fat deposits continue.
Movements decrease as the fetus has less room to move around.
Acquires disease-fighting antibodies front he mother's blood.
Descends into pelvis, ready for birth.