Estimated Doses to Fetal Thyroid
| Dose from 131I | ||
| Gestational age (mo) | mGy to fetal thyroid/MBq administered to mother | rad/mCi |
| 3 | 230 | 850 |
| 4 | 260 | 960 |
| 5 | 580 | 2,150 |
| 6 | 550 | 2,000 |
| 7 | 390 | 1,400 |
| 8 | 350 | 1,300 |
| 9 | 270 | 1,000 |
Data (mGy/MBq administered to the mother) are from Watson (121).