That is how much the woman's cervix has to dilate before she is encouraged to push her baby out.
And what's more, the 10cm represent merely the pushing point. The cervix can continue to expand to accommodate the baby's head.
(Are you calling your mother to say sorry for everything right now? You should be).
Steffanie Christi'an, a singer and songwriter from Detroit, Michigan, posted the photo on Facebook and it quickly went viral.
"This is what 10cm of dilation looks like. This is why we deserve all the things," she wrote in a post that's been shared 169,000 times.
The photo has also gone viral on Twitter.