... types of malformations were a cleft palate (Fig 1), dilata- Influence of gestational age at exposure on the prenatal effects of gamma-radiation 39 Fig Malformed palate of mouse fetus: cleft palate ... Observations on the 18th day of mouse fetuses exposed to Gy gamma-radiation on different gestation days Observations No of mother No of implants No of embryonic death No of fetal death No of resorption ... Health effects of exposure to low levels of ionizing radiation Biological effects of ionizing radiations Washington, National Academy Press, 1990 Brent, R D The effects of ionizing radiation, microwaves,...