It's possible. Your chart won't be able to tell you though unless you've already missed a period. It's not an exact science, but it can clue you in on what your body is doing. When you get pregnant, you will usually have what is called a triphasic chart. This is when you'll have three levels of temps on your charts. Just as your temp goes up for the ovulation, your temp will go up again for your pregnancy, but usually not until around when your period is due. Here's an example...
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