Chronic metro-endometritis, both corporal and cervical, occurs occasionally in young girls during the years of development. It is especially common in chlorotic subjects; and next to these in girls who are careless about the observance of hygienic precautionary measures during the menstruation. Thus it may result from physical exertion among the working classes; and from dancing, skating, riding, or mountaineering, among girls belonging to the well-to-do classes, during menstruation. Again, we meet with it in girls who work very hard at the sewing-machine; and, finally, in those who have long practiced masturbation. Through uncleanliness at the time of menstruation, the blood with which chemise and drawers are stained and the pubic hair soiled, undergoes decomposition, and this may lead to catarrhal inflammation of the vulva and vagina and of the endometrium. The most striking symptom in persons thus affected is the discharge of mucus, which in cervical metro-endometritis leads to a very moist condition of the external genitals, and leaves greenish-yellow spots on the under-linen; in corporal metro-endometritis the discharge is of a thinner consistence, milky in appearance, and not very abundant. As a result of the endometritis, the patient suffers from various pains in the body, a feeling of fulness, sacrache, general sense of fatigue, and diverse nervous manifestations; sometimes also from dysmenorrhœa, strangury, or obstinate constipation. In consequence of the great thickening of the mucous membrane that often occurs, menstruation becomes very profuse and long-continued, lasting from one to two weeks.