What is the guideline for pregnant workers in terms of radiation exposure?

The guideline for pregnant workers regarding radiation exposure is established to protect both the worker and the developing fetus. Limiting exposure to 0.5 mSv during pregnancy is based on recommendations from organizations such as the International Commission on Radiological Protection (ICRP) and the National Council on Radiation Protection and Measurements (NCRP). This limit is set to minimize the risk of potential radiation-induced effects on the fetus, particularly in the early stages of pregnancy when the unborn child is most vulnerable to radiation exposure.

This guideline is protective, accounting for both the possibility of stochastic effects, such as cancer, and potential non-stochastic effects, which can lead to developmental abnormalities. Therefore, adhering to the 0.5 mSv limit serves as a precautionary measure in safeguarding the health and safety of both the pregnant worker and their child.