• Motion increases as the fetus moves its body and swallows.
• The skin is transparent and pink in color.
• The umbilical cord is now thick enough to carry nutrients from the mother to the fetus, as well as toxins and poisons from tobacco smoke, alcohol and other drugs.
• The fetus weighs about five ounces and is approximately four to five inches long by the end of Week 16.

A compact disc, or CD, is 4.5 inches in diameter.

Click here for a list of clinics offering free pre-natal ultrasounds