Which boxer won the 2012 Olympic women's flyweight gold medal?

Nicola Adams won the 2012 Olympic women's flyweight gold medal for Great Britain. She defeated China's Ren Cancan in the final at London's ExCeL Exhibition Centre, winning 16–7.

The victory was historically important because London 2012 was the first Olympic Games to include women's boxing. Three women's divisions were contested: flyweight, lightweight, and middleweight. Adams therefore became the first woman to win an Olympic boxing gold medal, rather than merely the first champion in her division.

The women's flyweight tournament ran from August 5 to 9, 2012, and used four two-minute rounds. The semifinalists who lost received bronze medals, so American Marlen Esparza and India's Mary Kom also became inaugural Olympic women's boxing medalists.

Adams successfully defended her flyweight title at Rio 2016, becoming the first boxer to win two Olympic women's boxing gold medals. Katie Taylor won the inaugural women's lightweight title, while Claressa Shields took middleweight gold, which explains why those names can appear alongside Adams in this question.