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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. -
Size: About 1/4 inch (6 mm) long as month begins.
Face, eyes, ears, and limbs take shape.
Bones begin to form. -
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. -
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. -
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. -
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. -
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. -
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. -
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.