lyme disease. shannon: an unborn baby underwent surgery and her mother's womb. >> that is amazing and incredible. the mom was 25 weeks pregnant and the baby has spina bifida. there is an opening at the bottom of the spinal cord. you have exposed spinal cord and that can cause neurological problems, swelling of the brain, problems like paralysis or difficulty walking so the reason surgeons wanted to operate in utero is because there's a better outcome, less chance of having difficulty walking, less chance of having fluid on the brain and this is a success, give so much hope for the future because we can maybe use these procedures for other things. >> how safe is that for the mother? >> more safe for the mom than for the baby because his