Final answer:
The exposure limit for the unborn child during the gestation period is 0.1 mSv. Low doses of ionizing radiation during pregnancy can cause severe damage to the embryo or fetus, including impaired growth, impaired neural development, low birth weight, spontaneous abortion, and stillbirth.
Step-by-step explanation:
The exposure limit for the unborn child during the gestation period is 1) 0.1 mSv
According to the information provided, whole-body, single-exposure doses of 0.1 Sv or less are considered low doses, and it is difficult to determine if a person has been exposed to less than 10 mSv. During pregnancy, exposure to toxic substances like ionizing radiation can cause severe damage or even death to the embryo or fetus, including impaired growth, impaired neural development, low birth weight, spontaneous abortion, and stillbirth.