Ever wonder what might be the cause of your PCOS? Well, we are going to go over the three main causes so that you understand a little bit better, in our ongoing blog topic: PCOS. Primarily, it is important to understand the genetics of PCOS. If you have a mother, an aunt, a grandmother, even a sister that has PCOS, you are more likely to develop PCOS. PCOS is basically a genetic factor very similar to diabetes and heart disease.