THE literature contains many reports of patients with leukemia who have had pregnancies terminating successfully in the birth of normal infants.1 , 2 Thus far, no child born of a mother with leukemia has been observed to have the same disease.3 , 4 The present report concerns an infant in whom acute lymphocytic leukemia developed at nine months of age. The mother had signs and symptoms of leukemia beginning in the seventh month of pregnancy, although the diagnosis of acute lymphocytic leukemia was not established until eight days post partum. Case Reports Case 1. J.C.M. (S.U.I.H. 57–8059), a 32-year-old housewife, was admitted to the . . .