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.
Harley Quinn, a.k.a. Dr. Harleen Quinzel is an enemy of Batman, and partner-in-crime to the Joker and Poison Ivy. She becomes fascinated with the Joker while interning at Arkham Asylum, and volunteers to analyze him. She immediately falls in love with the Joker during their sessions. After helping him escape from the asylum more than once, she is caught by her superiors, who revoke her license and put her in a cell of her own. During an earthquake in Gotham City, she flees and becomes Harley Quinn, the Joker's partner-in-crime. She is stuck in a highly abusive relationship. No matter how bad Joker is to her, she always comes back to him. On several occasions she has tried to cut ties with him but has failed to do so.