The effects of cadmium on the oviduct of 32 rabbits were studied by light microscopy with morphometry. Cadmium was administered intraperitoneally (i.p.) to group A in a single dose of 1.5 mg/kg body weight (BW), per oss (p.o.) to group B in daily doses of 1.0 mg/kg BW for a 5-month period, and also p.o., 1.0 mg/kg BW; for a 5-month period daily followed by a 7-month interval in group C. All experimental groups were compared to the control group (K), as well as to other experimental groups. Animals were examined directly after the experimental period. The amount of epithelium in the oviduct ranged from 19.67 to 25.50%, with no significant differences. Significantly higher amounts of stroma were found in group A in comparison with group C. In the stroma, dilatation of blood vessels was evident with subsequent oedematization and diapedesis. No significant differences were found in the muscular layer