Dr. Oz weighs in on the disease that had music superstar Avril Lavigne her bedridden for months. Plus, meet a viewer who lost a whopping 237 pounds. 

After years of trying to get pregnant, doctors told Kelsi Pierce it would be near impossible for her to conceive a child. However, Kelsi got the surprise of her life when her mom volunteered to be her surrogate — and she found out she, too, was pregnant!

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