Which of the following limits refers specifically to the occupationally exposed fetus?

The limit that refers specifically to the occupationally exposed fetus is 0.5 rem for nine months. This dose limit ensures that the developing fetus is protected from potential harmful effects of radiation exposure throughout pregnancy. The recommendation is tailored to account for the cumulative exposure experienced by the fetus during this sensitive period, emphasizing the importance of minimizing radiation exposure to protect fetal development.

Other options offer limits that may pertain to different contexts of radiation exposure or individuals. For instance, 0.1 rem per month and 0.03 mSv per month do not reflect the cumulative nature of exposure over the entire duration of pregnancy, thus making them less applicable to this specific scenario. Similarly, a limit of 5 rem for the duration could refer to occupational exposure limits for adults but does not account for the unique vulnerability of a developing fetus. This emphasizes the need for strict adherence to designated limits during pregnancy to prioritize the health and safety of both the mother and fetus.