We report on a patient aged 17 years with anorexia nervosa associated with gynecological problems. This patient came from Clinic of Psychiatry to a childhood and adolescent gynecology ambulatory because of a lack of menstruation connected with anorexia nervosa. According to Tanner scale: A4P4Th3. Girls with low body mass index (BMI) and girls with bariophobic syndrome are the risk group of development of primary osteoporosis- this patient was one of this group. The full gynecological examination together with USG, BMD showed that the girl had hypoestrogenism connected with oligomenorrhoea and osteoporosis; vulvovaginitis. Further psychological and medical hormonal and diet examination showed that the very important for patient with anorexia nervosa is relations with life partner too. In conclusion, there is doctors’, teachers’ and psychologists’ important task to provide quick and reliable identification of anorexia nervosa to enable therapy-with anorexia nervosa are connected many medical and psychological problems.