Quote Originally Posted by frankykeno View Post
I've personally never heard of sperm retention in rats and never seen it with all the rats I've bred here. Not saying it's impossible I guess, just I've never seen it.
Shaun's talking about how if a female has her litter and the male immediately impregnates her, she "holds" the sperm for one week and then will drop the second litter four weeks after the first litter was born. That's what was explained to me when Scarlett had back to back litters when she had one litter while still in with Caesar.