Exposure to Radiation During Pregnancy Policy

Summary of Policy

A policy regarding a more restrictive dose limit of a declared pregnant radiation worker.

Affected Parties

All Groups

Policy Statement

Research has shown that a fetus is more sensitive to the damaging effects of radiation exposure, particularly during the first trimester of the pregnancy. In recognition of this increased radiation sensitivity, a more restrictive dose limit has been established for the embryo/fetus of a declared pregnant radiation worker. Guidance in conformance with the revised 10 CFR Part 20 is being developed as a proposed Revision 3 to Regulatory Guide 8.13. It has been published as Draft Regulatory Guide DG-8014 "Instruction Concerning Prenatal Radiation Exposure." Currently NRC regulations require that the radiation dose to the fetus of an occupationally exposed pregnant worker be held to 0.5 rem (5 mSv) or less during pregnancy. (see also Declared Pregnant Radiation Worker Policy Statement.)

Radiation protection regulations allow a pregnant radiation worker to decide whether she wants to formally declare her pregnancy to her employer, thereby taking advantage of the special dose limits provided to protect the developing embryo/fetus. If an occupationally exposed woman declares her pregnancy to the Radiation Safety Officer then she is subject to the more restrictive dose limits for the embryo/fetus during the remainder of the pregnancy which is controlled by restricting the exposure to the declared pregnant woman. Restricting the woman's occupational exposure, if she declares her pregnancy, raises questions about individual privacy rights, equal employment opportunities and possible loss of income. Because of these concerns, the declaration of pregnancy by a woman radiation worker is voluntary. Conversely, the woman can also withdraw her declaration of pregnancy by notifying the Radiation Safety Officer.

When a worker has made the decision to formally declare her pregnancy, she may complete "Form Letter for Declaring Pregnancy" or she may submit her own letter. Once this form has been received, the Radiation Safety Officer will contact the worker to discuss her use of radioactive materials or work with x-ray producing equipment in the lab, her previous exposure history and any other relevant information. At this time, the worker is offered the opportunity to enroll in the pregnancy surveillance program that allows for the closer monitoring of radiation exposure to the fetus during the entire pregnancy.

Policy ID


Effective Date

February 19, 2016


Campus Services

Office of Primary Responsibility

Office of Environmental Health & Safety (EHS)

Last Reviewed Date

July 5, 2022

Next Review Date