Xu Yunyun, 28, took part in the competition at the Beijing Olympic Park and stole the show with her heavily-pregnant belly.
Xu is expecting her baby to arrive at the start of March and believes the training will make the delivery easier.
She said: "I have always been an enthusiastic runner and I don't see any reason why I need to stop just because I'm pregnant.
"I took an easy pace and didn't overstretch myself, and my doctor told me the carrying on exercising is the best way to ensure a healthy baby is born."
The expectant mother took inspiration from Paula Radcliffe MBE who ran twice a day during the first five months of her 2006 pregnancy.
The sportswoman famously said to Runner's World of running during pregnancy: "Running now is about staying sane, but it's also keeping yourself fit because that's what we do, and also because all of the research says that it's good for the baby, too.
"It's hard when people say, 'Are you sure you're doing the right thing? What if you're shaking that baby to death?'
"I mean, obviously I still do all of the checks to make sure that all of the kicks are still there in the right places and that I'm eating right. I don't regret anything I did through my pregnancy… she came out perfect."
Studies have shown that exercise improves the health of mother and baby; it lessens back pain, prevents excessive weight gain, improves sleep quality, and reduces delivery complications and time spent in labor.
However you should only try running through pregnancy if you are already a runner. Otherwise you might prefer a lower-impact activity, such as walking or swimming, where your baby is supported in the water.