“Over the weekend, Olympic sprinter Allyson Felix won her 12th gold medal at a track-and-field World Championship—breaking a record formerly held by Usain Bolt, the runner often referred to as the world’s fastest man.

Felix, 33, took the world medal-count record from Bolt in Doha after a 4 x 400 mixed-gender relay race victory. She’s competed in four Olympics and won nine medals, six of them gold, but what makes this victory even more important is that it’s Felix’s first since giving birth to her daughter, Camryn, 10 months ago.

The birth wasn’t easy. People reports that the Olympian suffered from severe preeclampsia and gave birth via C-section. “It’s different, definitely challenging. I think for any new mom when she returned to work just, you’re exhausted and you’re balancing your family and what it all looks like,” she told the magazine in July about getting back into her training routine.”