The length of the cycleand can vary widely in young girls: regular he sometimes becomes only a year since the appearance of first menstruation discharge.Irregular periods often worry and women aged 45 to 55 years, when the cycle is gradually fading. It is not considered a pathology, if there are any other abnormalities.Normal cycle- diffraction process in a woman's body (i.e., the maturation of the dominant follicle, ovulation and the rejection of the endometrium) can be stopped under the influence of various stressful situations or even with small disturbances, such as change of work or residence. After normalization of food, good rest and sometimes the use of drugs cycle is established again.Failure to cyclecan occur when changes in climatic conditions, which turned out to be a woman. For example, if she flew from Northern to the southern hemisphere or went to the Arctic. Causes of disorders of the menstrual cycleand can be severe infectious diseases, and various intoxications, such as alcohol, Smoking, drugs, harmful substances in the workplace. Such a nuisance may also result from diseases of the heart and blood vessels, kidneys, liver and blood diseases.Dramatically change the course of the cycleand the ability and change of diet. Starvation and lack of food of vitamins and minerals in the body, apparently, also perceives as stress. The same happens when a sudden weight gain or, conversely, during rapid weight loss.Sometimes the cycle slips due to medication, though, as physicians consider, often this happens if the woman herself, without medical advice, "assigns" itself and takes any medication. Especially dangerous in this respect, hormones and dubious weight loss products.Endocrine diseases can also manifest themselves in disorders of the menstrual cycle. These include diabetes mellitus, a disorder of the adrenal glands and the thyroid gland.A significant impact on the cycle of monthly discharge can provide some of the processes occurring in the cortex after trauma, bruises and contusions of the brain.And, of course, the most common causes of violations of the cycleand menstruation are "women's" diseases like endometriosis, uterine fibroids, polycystic ovaries, inflammatory processes in the uterus and its appendages, and many others. To restore the cycle and, consequently, health will help timely treatment to the doctor.