Inbreeding had an unfavourable linear effect (...) on all 3 traits analyzed (table5). From these results, it may be determined that a cow 12.5% inbred (born following the mating of noninbred half-siblings) is expected to have, on average, a longer calving interval of 8.8d, be 2.5d older at first calving, and have a 4% lower survival to second lactation