The influence of amphetamine addiction on pregnancy and the newborn infant has been studied retrospectively in 23 cases. Six of the mothers claimed to have discontinued their abuse in early pregnancy, while the remaining 17 mothers continued throughout. In comparison with the average number of visits by pregnant Swedish women to maternal health centres, the 17 women who continued their abuse made significantly fewer visits, although there was a wide variation. Complications related to pregnancy and delivery were few, however. One child with a myelomeningocele was stillborn. Six children were preterm and three small for gestational age. Two full-term children were extremely drowsy and in need of tube feeding, symptoms that might be due to the maternal abuse. Eight of the ten mothers, who had previous children placed in foster homes by the Social Welfare Department, left the hospital with their newborn infant in their care as well as all the eleven primiparae.