One of a kind. This week, your little one is developing one of the characteristics that will make her unique: fingerprints. Pads of fat accumulating on the fingertips and toes will turn into distinguishing swirling lines.
Prepping the plumbing. "What happens when this stuff goes down into my stomach?" The large intestine has been tacked down to the back of the abdominal wall, and many digestive glands are forming. This developing digestive system has been going through its paces for several weeks already: the foetus is swallowing amniotic fluid, which then makes its way through the stomach and intestines. Now, that fluid combines with dead cells and secretions in the intestines to form meconium. Meconium is the greeny/black, tarry substance that will eventually fill your baby's first nappy.
Measuring up. The foetus weighs up to 200 grams (about 7 ounces) and is about 16-18 cm (about 6.3 to 7 inches), top to bottom.

Thinking Cap A view from the top of the head shows the developing brain. The parts of the brain are separated by the membrane, appearing here as a horizontal white line. This view is very important in assuring your doctor that the brain is developing correctly