What is the equivalent dose limit for the embryo-fetus per month?

The equivalent dose limit for the embryo-fetus is set at 0.5 mSv per month to ensure the safety and health of the developing fetus during pregnancy. This limit is based on guidelines established by radiation protection agencies, which aim to minimize the potential risk of radiation exposure to the embryo or fetus, especially during the early stages of development when the cells are most sensitive to radiation.

The monthly limit of 0.5 mSv reflects a balance between allowing necessary occupational radiation exposure for pregnant workers while also providing robust protection to the fetus. This precaution is critical due to the potential for high-stakes developmental outcomes that can arise from excessive radiation exposure during pregnancy.

In contrast, the other options suggest higher monthly exposure limits, which could pose significant risks to fetal development and do not align with the recommended safety standards in radiological protection.