I think most people know that getting pregnant after 40 will not be as easily done as getting pregnant in your 20s or 30s.
However, it seems like everyone knows at least a few people who got pregnant after 40 without any trouble at all. Celebrities commonly get pregnant after 40, and while many of them use fertility treatments to get there, all of this leads to the false belief that age doesn't matter that much.
This isn't true. Age does matter. And even if you're healthy, a good weight, workout, and live a generally well balanced life, you're not guaranteed amazing fertility after 40.
So, what are your chances? Read more about getting pregnant after 40 here.

