question on being a carrier of dmd

I have more of a question then message. My brother had dmd he past away in 96 because of it. I now have a one year old daughter. I am aware that this type of dystrophy is past from mother to son and I was tested as a young girl, I'm a carrier, from what I know I'm a low risk. What exactly dose that mean my odds are of having a son with dmd? This is my last hope for any good news. I've had my doctor set up surgy for me to have my tubs tied, because I couldn't bare the guilt of maybe passing this on .