March, 1906. Pennsylvania Society for the Prevention of Social Diseases organized.
October, 1906. Chicago Society of Social Hygiene organized.
December, 1907. Portland (Ore.) Social Hygiene Society organized.
October, 1908. Spokane Society of Social and Moral Prophylaxis organized.
June, 1910. American Federation for Sex-Hygiene organized.
1911. Oregon Social Hygiene Society organized.
July 20, 1912. Resolution of the National Education Association favoring training of teachers with the view, ultimately, of sex-instruction in schools.
September 23-28, 1912. Meeting of subsection on sex-hygiene, Fifteenth International Congress on Hygiene and Demography. Washington, D.C.
February, 1912. Organization of American Vigilance Association.
October, 1913. Merging of the American Federation for Sex-Hygiene and the American Vigilance Association into the new American Social Hygiene Association.