Vets in the U.K. have been left stunned after discovering a cat born neither a boy or a girl.
Tabby-and-white cat Hope (now called Beans) was originally thought to be a female cat when they were admitted into Cats Protection's care but on closer inspection, it was discovered they had no sex organs at all.
While hermaphrodite cats - which are also extremely rare - have both male and female sex organs, Hope has neither externally nor internally.
Cats Protection's Senior Field Veterinary Officer Fiona Brockbank said: "We carried out a procedure to look for sex organs but there's nothing apparent inside or out. There's an outside possibility of some ectopic ovarian tissue hiding away internally but we think this is extremely unlikely.
"This is so rare that there isn't really a commonly used term for this condition, but it is effectively 'sexual organ agenesis' - where agenesis is the lack or failure of development in relation to body organs. This is not something we've come across before at Cats Protection."
At 15 weeks old, Hope is very much a playful kitten who has endeared themselves to staff and volunteers at both Cats Protection's Warrington Adoption Centre, where they were first admitted and underwent investigations, and the charity's Tyneside Adoption Centre, where they were awaiting rehoming.
In fact, one member of staff at the Tyneside Adoption Centre fell so much in love with the unusual kitten they have taken them into their own home and renamed them Beans.