What is the NCRP recommended monthly effective dose limit to the fetus for a pregnant worker?

The NCRP (National Council on Radiation Protection and Measurements) recommends that the monthly effective dose limit to the fetus for a pregnant worker should not exceed 0.05 rem (0.0005 Sv). This guideline is established to protect the developing fetus, which is particularly sensitive to radiation exposure during its growth and development.

The emphasis on limiting radiation exposure during pregnancy stems from the potential risks that high doses of radiation can pose, including developmental issues or increased risk of cancer later in life for the child. The monthly limit of 0.05 rem aligns with the overarching principle of radiation safety — to keep doses as low as reasonably achievable (ALARA). This limit helps ensure that even in a worst-case scenario, the total exposure throughout the pregnancy remains within safe thresholds, preserving both maternal and fetal health.

Understanding this framework is critical for those working within radiology and related fields, as it reinforces the importance of mindful practices concerning radiation exposure for pregnant workers.