As long as you are still getting your period, there is still a chance of pregnancy. As well, many women who stopped having their periods for over a year thought they were safe, yet did not know they were still ovulating and got pregnant. That is why you should continue to use protection. Nothing short of a hysterectomy can stop it without protection. Unless it has been 10 years, but I have known women to get pregnant close to 60 with no period