5224 E. Indiana Beach Rd., Monticello, Indiana 47960 - (574) 583-4141. 5224 E. Indiana Beach Rd., Monticello, Indiana 47960 - (574) 583-4141.
Once the total effective dose to the embryo/fetus of the declared pregnant woman exceeds 400 mRem, she will be restricted from any further work involving occupational radiation exposure for the remainder of the pregnancy.
There is no minimum threshold.. Exposure from x-rays or gamma rays is measured in units of roentgens. For example: 1  Total body exposure of 100 roentgens/rad (or 1 Gy) causes radiation sickness. 2  Total body exposure of 400 roentgens/rad (or 4 Gy) causes radiation sickness and death in half the individuals.