Depends. Sometimes a first time cat mommy or a very young cat will have only one or two ;o).

Our mothercat was only 11 months old when she got her first kittens, after the first one was born we had to wait the whole night before the other two came, who surprisingly appeared to be an identical twin.
I went to bed after the first one because I had to work the other day, but my wife and my daughters stayed up all night. So indeed, it can take a long time. They were all born on the first of april, 11 years ago now.

Sorry for the OT, but that happens when cats come in.

BTW, Good work with the Antonia wiki-site! When I have time I try to make something for Antonia. I'm working on a skull-cap for dynamic hair, but I haven't had the time to finish it..

Best regards,

Bopper.

-How can you improve things when you don't make mistakes?