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1 Μαΐ 2023 · Pregnancy loss most often happens when radiation exposure happens during early gestation (less than two weeks). [2] . Malformations of body parts and developmental delays occur during the organogenesis period (2 weeks to 8 weeks) and are dependent on the radiation dose. [2] .
Radiation risks are most significant during organogenesis and the early fetal period, somewhat less in the second trimester, and least in the third trimester; During the period of <25 weeks post conception, the central nervous system (CNS) is particularly sensitive to radiation.
15 Νοε 2021 · In this paper we consider exposures of pregnant women, chiefly in medical settings, review the effects of low, moderate and high dose radiation exposures on the embryo and foetus, and evidence for any difference in the response of pregnant women to radiation.
24 Απρ 2024 · Most of the ways someone who is pregnant may be exposed to radiation, such as from a diagnostic medical exam or an occupational exposure within regulatory limits, are not likely to cause health effects for a fetus.
In the early stages of pregnancy, embryo sensitivity is such that dosages of hundreds of rad per day of fractionated radiation therapy would not allow the embryo to survive. When exposures occur later in gestation, embryo sensitivity decreases but is still vulnerable to the cell-killing effects.
1 Ιουλ 2007 · The potential biological effects of in utero radiation exposure of a developing fetus include prenatal death, intrauterine growth restriction, small head size, mental retardation, organ malformation, and childhood cancer. The risk of each effect depends on the gestational age at the time of exposure, fetal cellular repair mechanisms, and the ...
