Which is the preferred birth control method for pcos?

Progesterone based: In pcos you have extra estrogen compared to progesterone. So using a Progesterone dominant birth control not only prevents pregnancy but helps balance the hormones. The Mirena (levonorgestrel) iud, Implanon and Depo Provera are all Progesterone only and work well. Birth control pills, patches and rings tend to be progesterone-dominant (more Progesterone effect) and also work well.

OCP's: The first line treatment for pcos is ocp's, a secondary benefit is the contraceptive effect.