"i&#039;ve been on yaz for about 3 months because of my severe acne. in the first two months my acne remained the same but my boobs increased in about a size and a half, which my doctor warned me about. it doesnt bother me as now my breast are fuller/ rounder however i have quite a few stretch marks. so i&#039;d recommend using bio oil on your chest and hips for the first few months on yaz just in case this happenes to you. at around month 3 my skin is not breaking out anywhere near as much. i&#039;m amazed by my skin, it&#039;s never been so good. overall i have never been so happy with my skin and i haven&#039;t even finished my third month. i still feel it getting better every day. i have experienced no other side effects beside slight fatigue."