PEDIATRICS Vol. 23 No. 1 January 1959, pp. 231-244
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A COMPARISON OF THE TERATOGENIC EFFECTS OF FIVE POLYFUNCTIONAL ALKYLATING AGENTS ON THE RAT FETUS

M. Lois Murphy M.D.1

1 Embryology Section, Division of Experimental Chemotherapy, Sloan-Kettering Institute for Cancer Research, Memorial Center for Cancer and Allied Diseases

Five alkylating agents and x-rays, administered to pregnant rats on the twelfth day of gestation and which were killed on the twenty-first day, produced malformations in the fetuses.

The dosages producing four measured effects on the pregnant rats and their fetuses for each of the five alkylating agents and x-rays were found to resemble each other more than in a comparison of six antimetabolites in a previous study.

There is a similarity of the malformations produced by these agents, but some distinct differences in gross soft-tissue and skeletal abnormalities are described.