A feline litter usually consists of two to five kittens born after a gestation lasting between 64 and 67 days, with an average length of 66 days. Kittens emerge in a sac called the amnion, which is bitten off and eaten by the mother cat.
âHarley Quinn. Dr. Harleen Frances Quinzel, also known as Harley Quinn (a pun on the word harlequin), first appeared in the Batman: The Animated Series episode Joker's Favor, where she served as a humorous female sidekick to the Joker.
She later appeared in DC Comics' Batman comic books, with the character's first comic book appearance in The Batman Adventures #12 (September 1993). Harley Quinn is the Joker's frequent accomplice and lover, whom she met while working as a psychologist at Gotham City's Arkham Asylum, where the Joker was a patient.