This study was undertaken to investigate the relation of plasma lead levels, and early pregnancy losses. The concentration of lead in the plasma was measured in 20 women with a history of pregnancy loss before the 20th gestational week, and the results were compared with 20 control patients with viable intrauterine pregnancy. The results showed a mean lead level of 18.8 microg/dL in the cases of pregnancy loss and 22.1 microg/dL in the control patients, thereby indicating that there is no significant relation between early pregnancy loss and maternal plasma lead levels.