Placental antigens and fetoproteins in the urine of rats - indicators of resorption of conceptuses.

Placenta-specific antigens and alpha-fetoprotein were detected in the urine of rats with induced abnormal pregnancies. Moreover, in those cases, in which the presumptive diagnosis of intrauterine fetal death or resorption was made, urinary excretion of placental antigens persisted for at least 5 days.