Meg Oliver reports that exercise during pregnancy benefits both mom and baby; donating blood can be good for you; and it may be possible to predict the recurrence of lung cancer after surgery.

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Meg Oliver reports that happiness increases with age; Congress says the government should be doing more to prevent infections at hospital; and high blood pressure can damage an aging brain.

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Meg Oliver reports a chemical in plastic containers may be linked to health problems; studies on red wine show it may help kill pancreatic cancer; and eating right helps kids perform better at school.

They're painful and often debilitating, and now doctors around the country are seeing more and more children who have them. CBS 2's Dr. Holly Phillips has more on tough-to-diagnose kidney stones.

There is an alarming study that shows childhood obesity could be causing a you person's heart. And research shows that vitamins may not help fight two common diseases. Dr. Mallika Marshall has more.