Post-Partum Thyroid Dysfunction

To the Editor: In contrast to their initial report, which emphasized either transient post-partum hypothyroidism^1,2 or transient recurrence of hyperthyroidism after delivery in Graves' disease,³ the more recent report of Amino et al. (April 8 issue)⁴ documented that most (70 per cent) of their post-partum patients had an initial transient thyrotoxic phase. Such results are now in agreement with our observations from Canada,^5,6 where we observed that most of our post-partum patients with transient hypothyroidism had an initial transient thyrotoxic phase with a suppressed radioactive-iodine thyroid uptake. From our observations, we suggested^{5 6 7} that the transient post-partum hypothyroid syndrome, as.