How can I tell that I'm ovulating?

Dear Doctor, My husband and I are trying for a baby. It will be our first. However, it’s been six months now and nothing has happened. We had ourselves checked and everything seems to be okay. I suspect we keep trying at the wrong time. So, how can I tell that I’m ovulating? I’ve been told that is when I’m most fertile.
no image
Dr. Rachna Pande