Hyperprolactinaemia:

Hyperprolactinaemia is the term given to having too high levels of prolactin in the blood. (Normal levels A reference range is a set of values used by a health professional to interpret a set of medical test results. The range is usually defined as the set of values 95% of the normal population falls within. 

It must be remembered that the reference range will vary, depending on the age, sex and race of a population, and even the machines the laboratory uses to do the tests. Also remember that by definition 5% of the normal population will fall outside the reference range.
..... Click the link for more information. are less than 580 mIU/L for women, and less than 450 mIU/L for men.) 

Hyperprolactinaemia is a common cause of menstrual The menstrual cycle is the periodic change in a woman's body that occurs every month between puberty and menopause and is related to reproduction. The average human menstrual cycle is 28 days long, but it can range from 21 to 35 days. It is controlled by hormones.