Radiation effects on embryo and fetu s

the period of major organogenesis.
severe mental retardation after irradiation in

the most sensitive prenatal period (8–15 weeks post conception)
cancer risk following in-utero exposure will be similar to that following irradiation in early childhood

with 224Ra analysed bone cancer data for 899 patients treated

in Germany between 1942 and 1964 with injections of the short lived alpha particle emitter 224Ra . Among them, 455 patients (including 244 children and juveniles under age 21) had tuberculosis and 393 (mostly male adults) ankylosing spondilitis. The risk per dose increased with the duration of exposure.
Radium dial painters.cancer data for 755 female dial painters who were first exposed before 1930.

Radiation effects on the induction of diseases other than cancer: