Ther'e's been analarming increase in the number of pregnant women with diabetes.

In the past seven years, the rate has more than doubled.
In pregnant teenagers, it has increased more than five times.

If not treated properly, diabetes boosts a pregnant mom's risk of miscarriage and birth defects.

Doctors are tying the increase with the rise of obesity.

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Genetic therapy may be the answer to curing those with inherited forms of blindness.

In this small study of six children and young adults.

Four went from being able to see just hand motions to being able to read lines on a vision chart.

"Think of it, our genes are what make our bodies work, and if we could use those genes to repair them and make them as drugs, you know that's magic," said Dr. Ronald Crystal of the Weill Cornell Medical Center.

Doctors actually use a tiny needle to deliver a virus that carries a healthy copy of the defective gene right into the retina.