Hi, Here we have to consider few points to know why your doctor suggested to change the pill. Yasmin contains ethinyl estradiol as estrogen and drospirenone as progesterone. Usually Yasmin is preferred for contraceptive piupose, though it can used for treatment of endometriosis. Whereas Qlaira comparatively having features like: - It contains Osteradiol vareate which is prodrug of estrogen and generally preferred in perimenopause, which can relieve the symptoms like hot-flushes, and also by maintaining the estradiol levels it can help in preventing the weight gain expected in menopausal age. - Dienogest which is the progesterone in Qlaria having specific binding with progesterone receptors and more preferred drug in endometriosis even with cysts. - And also as dosage of hormones changes in Qlaria according to natural hormonal cycle, it is more useful to you at this condition. According to my view you may follow your doctor s suggestion. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Sree Gouri S. R., OBGYN