Late Establishment of Menstruation.--In some cases menstruation never appears until late in life, presenting the same phenomena as normal menstruation. Perfect relates the history of a woman who had been married many years, and whose menstruation did not appear until her forty-seventh year. She was a widow at the time, and had never been pregnant. Up to the time of her death, which was occasioned by a convulsive colic, in her fifty-seventh year, she had the usual prodromes of menstruation followed by the usual discharge. Rodsewitch speaks of a widow of a peasant who menstruated for the first time at the age of thirty-six. Her first coitus took place at the age of fifteen, before any signs of menstruation had appeared, and from this time all through her married life she was either pregnant or suckling. Her husband died when thirty-six years old, and ever since the catamenial flow had shown itself with great regularity. She had borne twins in her second, fourth, and eighth confinement, and altogether had 16 children. Holdefrund in 1836 mentions a case in which menstruation did not commence until the seventieth year, and Hoyer mentions one delayed to the seventy-sixth year. Marx of Krakau speaks of a woman, aged forty-eight, who had never menstruated; until forty-two years old she had felt no symptoms, but at this time pain began, and at forty-eight regular menstruation ensued. At the time of report, four years after, she was free from pain and amenorrhea, and her flow was regular, though scant. She had been married since she was twenty-eight years of age. A somewhat similar case is mentioned by Gregory of a mother of 7 children who had never had her menstrual flow. There are two instances of delayed menstruation quoted: the first, a woman of thirty, well formed, healthy, of good social position, and with all the signs of puberty except menstruation, which had never appeared; the second, a married woman of forty-two, who throughout a healthy connubial life had never menstruated. An instance is known to the authors of a woman of forty who has never menstruated, though she is of exceptional vigor and development. She has been married many years without pregnancy.