What is the allowed dose of ionizing radiation to a declared pregnant woman's embryo/fetus?

The allowed dose of ionizing radiation to a declared pregnant woman's embryo or fetus is set to minimize potential risks during pregnancy. The recommendation typically follows guidelines from organizations such as the National Council on Radiation Protection and Measurements (NCRP) and the International Commission on Radiological Protection (ICRP).

In the context of the choices provided, the allowance is often articulated as 10% of the standard occupational dose for the duration of the gestation period. This means that during pregnancy, the cumulative radiation dose to the developing embryo or fetus should not exceed 10% of the annual occupational dose limit.

This approach takes into account the increased sensitivity of the developing fetus to radiation, particularly during the first trimester when organogenesis occurs. Limiting the dose helps ensure that the risk of radiation-related adverse effects, such as developmental abnormalities or increased risk of cancer, is kept as low as reasonably achievable.

The other options present different percentages or timeframes that do not align with current guidelines for radiation exposure during pregnancy. This makes the choice representing 10% of the standard occupational dose over the gestation period the most appropriate and compliant with health and safety recommendations.