Who is allowed to par­tic­i­pate? The emotional debate about trans people in sport

08.01.2022 - Pennsylvania's Lia Thomas looks on in the warm-up pool during the Dartmouth Yale Penn meet, Saturday, Jan. 8, 2022, in Philadelphia. (AP Photo/Chris Szagola)
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08.01.2022 - Pennsylvania's Lia Thomas looks on in the warm-up pool during a swim meet, Saturday, Jan. 8, 2022, in Philadelphia. The NCAA has adopted a sport-by-sport approach for transgender a...
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08.01.2022 - Pennsylvania's Lia Thomas looks on following the 200m Free during the Dartmouth Yale Penn meet, Saturday, Jan. 8, 2022, in Philadelphia. (AP Photo/Chris Szagola)
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08.01.2022 - Pennsylvania's Lia Thomas looks on during a swim meet, Saturday, Jan. 8, 2022, in Philadelphia. The NCAA has adopted a sport-by-sport approach for transgender athletes, bringing th...
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08.01.2022 - Penn swimmer Lia Thomas smiles with teammates after finishing first in a 200m women's race in Philadelphia, Saturday, Jan. 8, 2022. The NCAA has adopted a sport-by-sport approach...
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08.01.2022 - Pennsylvania's Lia Thomas warms-up during a swim meet, Saturday, Jan. 8, 2022, in Philadelphia. Outside the program, Thomas has suffered barbs from athletes, politicians and celebr...
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08.01.2022 - Pennsylvania's Lia Thomas looks on as she celebrates senior day with her teammates during a swim meet, Saturday, Jan. 8, 2022, in Philadelphia. The NCAA has adopted a sport-by-spor...
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19.11.2021 - University of Pennsylvania transgender athlete Lia Thomas competes in the 200 freestyle finals at the NCAA Swimming and Diving Championships Friday, March 18, 2022, at Georgia Tech...
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17.02.2022 - Penn's Lia Thomas leads the team in a cheer before the relay events at the Ivy League Women's Swimming and Diving Championships at Harvard University, Wednesday, Feb. 16, 2022, in...
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17.02.2022 - Penn's Lia Thomas, center, reacts after swimming the first leg of the 800-yard freestyle relay event at the Ivy League Women's Swimming and Diving Championships at Harvard Universi...
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18.02.2022 - Penn's Lia Thomas walks under an "8 Against Hate" banner at the Ivy League Women's Swimming and Diving Championships at Harvard University, Thursday, Feb. 17, 2022, in Cambridge, M...
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19.02.2022 - Pennsylania's Lia Thomas smiles after setting a meet and pool record in the 200-yard freestyle final at the Ivy League women's swimming and diving championships Friday, Feb. 18, 20...
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19.02.2022 - Pennsylvania's Lia Thomas smiles after setting a meet and pool record in the 200-yard freestyle final at the Ivy League women's swimming and diving championships at Harvard Univers...
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19.02.2022 - Penn's Lia Thomas celebrates with the first place medal and sign after winning the 200-yard freestyle final at the Ivy League Women's Swimming and Diving Championships at Harvard U...
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19.02.2022 - Pennsylvania's Lia Thomas, top, celebrates with the first-place medal and sign after winning the 200-yard freestyle final as third-place finisher Harvard's Molly Hamlin applauds du...
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20.02.2022 - Pennsylvania's Lia Thomas cheers for teammates competing in the 1650-yard freestyle final at the Ivy League swimming and diving championships at Harvard, Saturday, Feb. 19, 2022, i...
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20.02.2022 - Pennsylvania's Lia Thomas, left, gets a hug from Yale's Iszak Henig following the medal ceremony after Thomas won the 100-yard freestyle and Henig finished second at the Ivy League...
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19.02.2022 - Pennsylvania's Lia Thomas waits to swim in a qualifying heat of the 200 yard freestyle at the Ivy League Women's Swimming and Diving Championships at Harvard University, Friday, Fe...
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20.02.2022 - Pennsylvania's Lia Thomas smiles after winning the 100-yard freestyle final at the Ivy League Women's Swimming and Diving Championships at Harvard University, Saturday, Feb. 19, 20...
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20.02.2022 - Pennsylvania's Lia Thomas smiles after winning the 100-yard freestyle final at the Ivy League Women's Swimming and Diving Championships at Harvard University, Saturday, Feb. 19, 20...
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17.03.2022 - Pennsylvania's Lia Thomas smiles after winning a preliminary heat in the 500-yard freestyle at the NCAA women's swimming and diving championships Thursday, March 17, 2022, in at Ge...
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17.03.2022 - University of Pennsylvania transgender athlete Lia Thomas waits for a preliminary heat of the 500 meter freestyle at the NCAA Swimming and Diving Championships Thursday, March 17,...
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17.03.2022 - University of Pennsylvania transgender athlete Lia Thomas perares for a preliminary heat of the 500 meter freestyle at the NCAA Swimming and Diving Championships Thursday, March 17...
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18.03.2022 - Pennsylvania's Lia Thomas prepares to swim the women's 500-yard freestyle final at the NCAA swimming and diving championships Thursday, March 17, 2022, at Georgia Tech in Atlanta....
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18.03.2022 - A protester holds a sign outside the arena where Pennsylvania's Lia Thomas was competing in the 500-yard freestyle final at the NCAA women's swimming and diving championships Thurs...
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19.03.2022 - Pennsylvania's Lia Thomas waves as she leaves the pool area after tying for fifth place in the 200 freestyle at the NCAA swimming and diving championships Friday, March 18, 2022, a...
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19.03.2022 - Protesters, one holding a sign, stand as Pennsylvania transgender athlete Lia Thomas competes in the women's 200 freestyle final at the NCAA swimming and diving championships Frida...
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19.03.2022 - University of Pennsylvania transgender athlete Lia Thomas holds her trophy after finishing tied for fifth the 200 freestyle finals at the NCAA Swimming and Diving Championships Fri...
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19.03.2022 - Protester hold signs as University of Pennsylvania transgender athlete Lia Thomas competes in the 200 freestyle finals at the NCAA Swimming and Diving Championships Friday, March 1...
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17.03.2022 - FILE - Pennsylvania's Lia Thomas waits for a preliminary heat in the Women's NCAA 500-yard freestyle swimming championship start, March 17, 2022, in at Georgia Tech in Atlanta. Flo...
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19.03.2022 - FILE - Pennsylvania's Lia Thomas waits for results after swimming the women's 200 freestyle final at the NCAA swimming and diving championships, Friday, March 18, 2022, at Georgia...
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22.01.2022 - FILE - Penn transgender swimmer Lia Thomas, right, dries off after warming up with the team before a NCAA college swimming meet with Harvard on Saturday, Jan. 22, 2022, at at Harva...
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20.02.2022 - Members of Pennsylvania's 400 yard freestyle relay team from left Margot Kaczorowski, Hannah Kannan and Lia Thomas, right, celebrate after winning the race at the Ivy League Women'...
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