It is a failure to have periods, which may be described as primary or secondary . Primary amenorrhoea is the failure to menstruate by age 16, and the main cause is the late onset of puberty. A girl may have the other signs of puberty but lack of periods. this may be a cause of a pituitary tumor, which can be found via a skull X -ray , or because of cryptomenorrohea, where menstrual bleedings does occur but it is held inside the vagina by an obstruction such as imperforate Hymen. The condition may arise because parts of the female reproductive system are missing. The most common reason for primary amenorrhoea is disruption of the relationship between the ovaries and the pituitary gland.

Secondary amenorrhoea occurs when a woman stops menstruating for 3 months or more after normal menstrual periods have been established but before the onset of the Menopause. It may arise as a result of stress, chronic diseases. Stopping the contraceptive pill, which affects hormone production in the brain , can cause amenorrhoea for up to a year, and it may arise after child birth and breast feeding. Failure of ovaries, prompting a premature menopause before the age of 40, is another cause. Amenorrhoea is permanent after the menopause or if the uterus is removed in a Hysterectomy



Keywords:Amenorrhoea,Absence of periods,primary ,secondary,Primary amenorrhoea,menstruate, puberty,lack of periods,pituitary tumor, skull X -ray , cryptomenorrohea, menstrual bleedings ,vagina ,imperforate Hymen, female reproductive system , relationship ,ovaries, pituitary gland,Secondary amenorrhoea , normal menstrual periods, Menopause,stress, chronic diseases, contraceptive pill, hormone production , brain , child birth,breast feeding,Failure of ovaries, prompting a premature , menopause , Hysterectomy