Abstract
Two relatively small doses of cortisone acetate administered to pregnant mice caused 1.4 and 12.0% cleft palate, respectively, in the offspring. A hypocaloric diet, consisting of about 40% of ad lib. daily intake, given during middle 3d of pregnancy, produced 5.6%, cleft palate. The doses of cortisone plus the restricted diet caused 36.8 and 50.79% cleft palate, respectively. These results are discussed.