Female kangaroos have two vaginas and two uteruses. They also have a third canal that is used solely for birth.

Female kangaroos have what are called paired lateral vaginae. These are for the purpose of transporting the sperm to the womb, but there is a midline pseudovaginal canal for actually giving birth.

Like most marsupials, male kangaroos (with the exception of the two most common species - red and gray) have a two-pronged penis to accommodate the females' two vaginas.