A hospital in Tokyo has successfully conducted Japan's first operation to treat an unborn baby for severe aortic stenosis, a serious heart disease, the hospital said.The baby, who underwent the surgery in July this year when the mother was 25 weeks into pregnancy, has been born and is making good progress, the National Center for Child Health and Development said earlier this month.The disease occurs when valves between the left ventricle, which pumps bloods to the entire body, and the aorta narrow, reducing or blocking blood flow. In severe cases, the disease can be life threatening.Accord…READ FULL ARTICLE