Ten mated female Wistar rats each were daily treated orally by gavage with PLT 2930 in 0.5 % carboxymethylcellulose in demineralized water from day 6 to day 19 p.c. in doses of 0, 10 and 1000 mg/kg body weight (b.w.)/day. Due to an incidentally low fertility rate 6 further mated females were added to the 10 mg/kg group. The fetuses were delivered by cesarean section on day 20 p.c. and blood was taken of the females by cardiac puncture together with maternal fatty tissue (renal fat) as well as one fetus each of the first 5 litters per group for toxicokinetic investigations (will be reported separately). Investigations were performed on general tolerance of the test compound by the females as well as on its effect on intrauterine development with external and skeletal evaluation of fetuses. Additionally macroscopically altered fetal adrenal glands were evaluated histopathologically.