I did not know that I was pregnant and inadvertently had a thyroid scan with a radioactive isotope at 7 weeks gestation. What will happen to my baby?
Specialized unique circumstances such as these should be discussed with an endocrinologist and obstetrician. The human fetal thyroid develops between 10-12 weeks of age, hence inadvertent administration of radioactive iodine isotopes to pregnant women earlier than 8 weeks of age will not usually affect fetal thyroid development. There is very little good clinical data from studies of this problem other than occasional case reports, hence management needs to be done on an individualized basis.
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