What are the reasons my aunt doesn't come?

There are many reasons for delayed menstruation in women. If amenorrhea occurs, there are primary amenorrhea and secondary amenorrhea. Primary amenorrhea occurs when a woman is older than 14 years and her secondary sexual characteristics are not developed, or when she is older than 16 years and her secondary sexual characteristics are developed and her menstruation is not developed. Secondary amenorrhea, we must first rule out the possibility of pregnancy, especially in women of childbearing age, secondary amenorrhea has many reasons, mental stress, weight loss, exercise, long-term strenuous exercise, may cause amenorrhea, there are drug causes, uterine trauma and ovarian trauma, etc. will cause menstruation does not come. Female patients with polycystic ovary syndrome can also be manifested as menstrual sparse hair or amenorrhea.