My brown rex(not sure on exact name) only have 6 or 7 babies her first litter, my black hooded rex had 13 her first litter and my Black rex with some white on her belly and I think chest had 16 her first litter but unfortunately she had a prolapse and I had to gas her....These were all rexes from my hairless females(I know bad to breed) first litter of only 3 babies that survived. These females were both bred at just under 200 grams and all had pretty good size litters.