This report presents the results of a study designed to evaluate the embryo/fetal toxicity and teratogenic effects of a series of ten experimental compounds (C-180, C-181, C-182, C-235, C-254, C-255, C-256, C-257, C-258, and C-259) when administered by gavage to pregnant rats from Days 6 through 15 of gestation. Each test material was administered to a group of twenty-two female rats at a single dose level specific to that material (Groups 2 through 12). An eleventh group (Group 1) served as a common control and received only corn oil. Maternal, ovarian, uterine, litter, and fetal data were evalua- ted for evidence of compound effects.