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.
Harley Quinn. Dr. Harleen Francis Quinzel, also known as Harley Quinn AND is a 'VILLAIN' not 'ANTI-HERO', first appeared in the Batman: The Animated Series episode Jokers Favor (episode #022, original air date: September 11, 1992) where she served as a humorous female sidekick to the Joker.
The character is a frequent accomplice and lover of the Joker, and a close friend of the supervillain Poison Ivy from whom she gained an immunity to poisons and toxins. Harley Quinn's origin story relates that she met the Joker while working as a psychiatrist at Arkham Asylum, where the Joker was a patient.Her name is a play on the name  Harlequin , a character which originated in the commedia dell'arte.he character is a frequent accomplice and lover of the Joker, and a close friend of the supervillain Poison Ivy from whom she gained an immunity to poisons and toxins. Harley Quinn's origin story relates that she met the Joker while working as a psychiatrist at Arkham Asylum, where the Joker was a patient.