More and more hospitals are now doing this type of procedure, including Cleveland Clinic's Fetal Care Center in Cleveland, Ohio.

\"VIDEO:
ABCNews.com
VIDEO: How toddler overcame spina bifida and is now walking
>

\"We're getting better at the surgical repair and people are working on trying to understand, 'Can we regrow nerves? Can we recapitulate some of the spinal cord structure and function?'\" said Dr. Darrell Cass, director of fetal surgery at the clinic.

Nearly two years after the operation, Charley is doing better than his parents could've ever imagined.

\"They're very confident that he'll walk at this point,\" Joshuwa Royer told \"GMA.\"

\"It's just so much joy and so much thanks,\" Lexi Royer said. \"He's so happy. When he walks he says, 'Woah!' [It's] almost like he can't believe he's doing it himself.\"

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