Hyperprolactinaemia is also a common problem in reproductive aged women. Both hyperprolactinaemia and PCOS had endocrine disorder and irregular menstrual cycle. Investigators hope to collect clinical data from PCOS and prolactinemia patients followed in Wang Fang hospital for many years in endocrinological and metabolical aspects for comparison. Investigators at the same time would like to understand more about other similarities and differences between these two endocrinological dysfunction for future study.