Baby is 1-1/8 inches long

Heart is functioning

Eyes, nose, lips, tongue, ears and teeth are forming

Penis begins to appear in boys

Baby is moving, although the mother can not yet feel movement

Baby is 2 1/2 to 3 inches long

Weight is about 1/2 to 1 ounce

Baby develops recognizable form

Nails start to develop and earlobes are formed

Arms, hands, fingers, legs, feet and toes are fully formed

Eyes are almost fully developed

Baby has developed most of his/her organs and tissues

Baby's heart rate can be heard at 10 weeks with a special instrument called a Doppler

Baby is 6 1/2 to 7 inches long

Weight is about 6 to 7 ounces

Baby is developing reflexes, such as sucking and swallowing and may begin sucking his/her thumb

Tooth buds are developing

Sweat glands are forming on palms and soles

Fingers and toes are well defined

Sex is identifiable

Skin is bright pink, transparent and covered with soft, downy hair

Although recognizably human in appearance, the baby would not be able to survive outside the mother's body

Baby is 8 to 10 inches long

Weight is about 1 pound

Hair begins to grow on baby's head

Soft woolly hair called lanugo will cover its body. Some may remain until a week after birth, when it is shed.

Mother begins to feel fetal movement

Internal organs are maturing

Eyebrows, eyelids and eyelashes appear

Baby is 11 to 14 inches long

Weight is about 1 3/4 to 2 pounds

Eyelids begin to part and eyes open sometimes for short periods of time

Skin is covered with protective coating called vernix

Baby is able to hiccup

Baby is 14 to 16 inches long

Weight is about 2 1/2 to 3 1/2 pounds

Taste buds have developed

Fat layers are forming

Organs are maturing

Skin is still wrinkled and red

If born at this time, baby will be considered a premature baby and require special care

Baby is 16 1/2 to 18 inches long

Weight is about 4 to 6 pounds

Overall growth is rapid this month

Tremendous brain growth occurs at this time

Most body organs are now developed with the exception of the lungs

Movements or "kicks" are strong enough to be visible from the outside

Kidneys are mature

Skin is less wrinkled

Fingernails now extend beyond fingertips

Baby is 19 to 20 inches long

Weight is about 7 to 7 1/2 pounds

The lungs are mature

Baby is now fully developed and can survive outside the mother's body

Skin is pink and smooth

Baby settles down lower in the abdomen in preparation for birth and may seem less active