Think of your cervix as the gatekeeper to your uterus. Lots of things—like tampons, fingers, penises, sex toys, and other germ-carrying items—can get to your cervix, but they aren't getting past it.
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The protective substance is an important barrier between the body and the environment. Here’s how researchers are using it to understand health. Credit: Wikimedia Commons/CC BY-SA 4.0 When Pilar Vigil ...
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