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 next appeared in Batman #663, in which she helps the Joker with a plan to kill all his former henchmen, unaware that the punchline to the scheme is her own death. Upon realizing this, she shoots him in the shoulder. In Birds of Prey #105, Harley Quinn joins the Secret Six as the sixth member.