The World Athletics Council has voted to ban transgender women from competing in women’s international track and field competitions, citing fairness as the primary reason. The new regulations, which will go into effect on March 31, 2021, are similar to those adopted by swimming last year and are expected to have a significant impact on Caster Semenya, a two-time Olympic champion at 800 meters. The decision has sparked controversy, with some arguing that it is unfair to exclude transgender athletes from competing in women’s events.