Which animal has given birth to the most live young in one litter?

The largest mammalian litter ever recorded at a single birth is 36, in the case of the common tenrec (Centetes ecaudatus) found in Madagascar and the Comoro Islands. Most litters number about 14.

But when I actually looked in my Guinness Book 2005, it had the same article with only 31. I then turned the page and found a mouse from the UK that had 34 mouselets. (What do you call a baby mouse, anyway?!)

Aha, just re-read the question and realized that it is a gmack question so one shouldn't take it at face value....Here I am thinking mammals, and of course we have ovoviviparous snakes about, so I guess now my answer should involve something like a Boa, which gives birth to live young and a litter is anywhere from 12 to 60 baby Boas.

http://www.tucsonsentinel.com/opinion/report/050910_17words/mothers-day-roman-colosseum/

The most fecund creatures I could find were tiger snakes. One such snake was recoreded to have given birth to a litter of 109 baby snakes.

Baby mice are called pinkies or kittens.