A new IAAF ruling was applied for the first time making gender verification for female events mandatory. As a consequence, all women competitors were forced to have a sex check. Several of the greatest women athletes missed this year's championships, among them world record holders Iolanda Balaș (high jump) from Romania, as well as Tamara Press (shot put) and Tatyana Shchelkanova (long jump), both from the Soviet Union.[1]
According to an unofficial count, 770 athletes from 29 countries participated in the event, one athletes more than the official number of 769 and one country less than the official number of 30 as published.[8]