TABLE 6

Radiation Dosimetry in Fetus/Embryo: Dose to Fetal Thyroid

Fetal thyroid dose*
Stage of gestationmGy/MBqrad/mCi
3 mo2.710
4 mo2.69.6
5 mo6.424
6 mo6.424
7 mo4.115
8 mo4.015
9 mo2.911

  • ↵* Per unit activity administered to the mother.

  • The fetal thyroid takes up iodine after 10–13 wk of gestation (31).