Week 23

The end of this week is an important milestone: Your one-pounder would have a good chance of survival if born now--about 85 percent if given the right care. His body is well proportioned, although lacking in body fat, and the blood vessels in his lungs are developing to prepare for breathing. About 50 percent of "early preemies" experience complications ranging from eye problems to intracranial hemorrhage (spontaneous bleeding in the brain); the rate drops steadily from the 24th week onward.