Wheat contaminated naturally with the Fusarium toxins deoxynivalenol (DON) and zearalenone (ZON) was fed to pregnant Landrace sows for 35 days. On day 110, caesarean section was carried out, the offspring were killed immediately after birth, and their livers and spleens examined. It was found that there are no adverse effects on the liver and spleen of full-term piglets when their mothers consumed diets containing up to 9570 and 358 lg DON/ZON per kg diet.