Olympic sprinter Allyson Felix has broken a world record held by a man, gold medal-winning track star Usain Bolt, and she did it just 10 months after giving birth.
Felix, 33, was part of Team USA's mixed-gender 4x400m relay team that won the gold at the World Championships Sunday.
The win gave Felix her 12th gold medal at the world championships, pushing her past Bolt's record for the most gold medals of any athlete at the track and field World Championships.
Felix's daughter, Camryn, was born last November via emergency C-section at 32 weeks.
The track star had to undergo a C-section because of severe pre-eclampsia.
Felix returned to competitive racing in July, eight months after giving birth, and has fought ever since to help pave the road for other professional athletes and moms.
She was part of a group of female track stars who alleged they were penalized by Nike for being pregnant. After the women spoke out, the company said it would do more to protect female athletes' pay during and after pregnancy.