History.
—C. H., a man, aged 37, married, with three children living and one stillborn, consulted me, Oct. 23, 1928, regarding two bald spots on his head, shown in the accompanying illustrations.He stated that the spots had appeared suddenly a month before, after the birth of his last child. After the diagnosis was made, he was assured that the hair would return in about a year. Further questioning revealed that thirteen years before, immediately following the birth of his first child, the same phenomenon took place. The involvement was greater, however, as it covered the entire left parietal region. Eight years before, at the birth of the second child, alopecia again appeared. One year before there was a stillborn child, and no evidence of alopecia.The recent attack was the third, each having followed the birth of a living child. Previous attacks had cleared up within a year.There