What is the dose limit for a pregnant radiation worker in the U.S. during the gestational period?

The recommended dose limit for a pregnant radiation worker in the U.S. during the gestational period is set at 0.5 rem, equivalent to 5 mSv. This limit is established to protect the developing fetus from potential harmful effects of radiation exposure.

The key rationale behind this specific limit is the increased sensitivity of a developing fetus to ionizing radiation, particularly during the early stages of development. By restricting the dose to 0.5 rem, guidelines aim to minimize the risk of teratogenic effects and other potential impacts on fetal development that can occur from higher doses of radiation.

This dose limit is typically viewed within the context of the overall occupational exposure limits for radiation workers, where the standard annual dose limit for the general radiation worker is higher. However, when it comes to pregnancy, the limit is more stringent, reflecting the priority given to fetal health and safety.