I know for a
fact that my little bro had a heart murmur
found at 5 months (his was a
small hole in
his heart), and it gradually over time closed up. I had one when I was younger, and by the time I was 14 I no longer had to see a cardiologist because mine had gone away. Low and behold, when I found out I was pregnant, my OB told me I had a heart murmur.