Anyway to know if you are fertile?

Is there any way to tell if your a fertile female or not? Other than trying to get preganat, I'm 16 so please don't advise this.
My sister is unable to have kids and I am afraid that I may have the same problem.

Most fertility problems are caused by trouble with the sperm, ovulation, obstruction of the fallopian tubes, an abnormally shaped uterus, endometriosis, or sexual difficulties, but a significant number of couples have unexplained infertility -- that is, testing is done, and nothing is found to explain why they aren't getting pregnant. Luckily, modern fertility treatments are often successful even when a specific cause is not identified. Talk to a doctor or nurse if you are concerned about your fertility.

Source: http://health.yahoo.com/experts/pregnancy/1284/how-do-you-know-if-youre-infertile/

Other than going to a doctor, I don't think there is anything else. But if you stress out about it you change your hormones and body chemistry, which makes it even harder to become pregnant. So I advise that you cross that bridge when you get to it and not worry about it.

I have also wondered about this question. I am 19 and my doctor told me that my uterus is turned a dif way, I don't know. but he said it wont cause problems right now but it could in the future. thats all he said. I cant decide if I should ask him about whether or not I am infertile because I dont want my mother thinking that I am trying to hae a baby just yet. I just kind of want to know. I also dont want my parents to get charged extra just because I am curious on whether or not I will ever be able to have kids of my own!