Can I get an annulment if husband lied about being able to have children?

My husband told me we could have a child before we married. He concealed the fact that he is impotent. I mean that in the sense that he cannot orgasm. I am sorry to be graphic. He is willing to admit this. We have been married for slightly over a year. I am 44 and he is 56 but I wanted another child before it was too late. I separated from him about 7 months after our wedding night. I discovered he was impotent on our wedding night. However we continued to try to fix the problem with the doctor until about the time I moved out. He also lied about severity of a medical problem prior to the marriage that causes the impotence. He just explained that to me yesterday. It is a male friction thing so being a female I had to have it explained to me.