14-year-old girl menstruation delayed 10 days has not come, may be mostly due to ovarian function is not yet mature, ovarian dysfunction caused by delayed menstruation. 14-year-old girl is only the first menstruation 1-2 years of time, this time adolescent women, the ovaries have not yet fully established the normal physiological cycle, so this time of the ovary may appear early or wrong menstruation, with age, the Ovarian function is gradually being established. Therefore, delayed menstruation in 14-year-old girls does not require special clinical treatment and can be observed. As the girl grows older, her ovaries will resume their normal ovarian cycle on their own.