Princess Albertina Piercing
From BME Encyclopedia
A Princess Albertina Piercing is a female urethral piercing.
This extremely rare piercing enters the female urethra and exits at the top of the vagina. A woman must have a large urethra to be able to get it, and should be warned that a piercing in this location can increase their risk of bladder infections.
A more extreme variation on this piercing is the "Scrunty Piercing".