 The "uinyeo" system first appeared in 1406 after King Taejong ordered its establishment in the "Jesaengwon" (濟生院 health care centers for commoners).The proposal for establishing uinyeo originated with Heo Do (許道), a government officer who held the title of "Jijesaengwonsa" (知濟生院事).He suggested to the king that a number of intelligent young women should receive medical training to treat women.