I never heard of this before but it turns out that one out of 4500 girls are born without a vagina.
The strange thing is that they look the same so they don't usually find out about it until they become teens and don't have periods. I can imagine it would be difficult to cope with this condition.
Here's the link:
Have you heard of this condition?
Spanko Brunch 2.0 #190
2 hours ago