The first mandatory sex test issued by the IAAF for woman athletes was in July 1950 in the month before the European Championships in Belgium. All athletes were tested in their own countries. Sex testing at the games began at the 1966 European Athletics Championships in response to suspicion that several of the best women athletes from the Soviet Union and Eastern Europe were actually men. At the Olympics, testing was introduced in 1968.
when did gender testing of female olympic athletes begin
1968