Data on 849 Bouscat (B) and Giza White (G) litters, collected from October 1975 to September 1983, were used to examine the effects on non-genetic factors on some litter traits and to estimate the repeatability for these traits. Parity, month of kindling and litter size at birth were the non-genetic factors investigated. Traits studied included litter weight at birth and at weaning, preweaning mortality and mean bunny weight at weaning. Fifty-two sires and 210 daughters (palernal half-sisters) were used for the analysis of these traits. Weaning litter weight and mean bunny weight increased (P