Yes. Some women can manage their PCOS just from diet and exercise (low carb diets and intermittent fasting can be particularly helpful), others with a combination of lifestyle changes and medications like metformin and/or clomid. Yet others need medical intervention to become pregnant. The condition can range quite a bit in severity, so what works for one person may not be enough for another.
If you're asking if PCOS is practically birth control, though... no, it isn't. Just because you may have been told by a doctor "It may be more difficult for you to get pregnant," that does NOT mean you're necessarily infertile, and it certainly doesn't mean you're sterile. They are not the same thing.