The authors describe the pathomorphological findings in the thymus, female genital organs and Bartholin's glands in 413 slaughter calves with white skeletal musculature. Anabolic substances like oestrogens, androgens, and corticosteroids had most likely been administered to a total of 302 of these animals. In all cases thymic atrophy was present. Microcysts of the ovaries were seen in 17% of the cases, mucometra of the uterus in 49%, hydrometra in 23%, and squamous metaplasia in Bartholin's glands in 15%.