Most infants with low T4 and normal TSH have normal FT4 values and the subsequent thyroid function test results are normal.
[ncbi.nlm.nih.gov]
[…] normalisation.2,4,7,11 - Antithyroidian treatment, Methimazole or Propylthiouracil, crosses the placenta and can affect fetal thyroid function leading to hypothyroidism and
[tmj.ro]
However, in Europe, l-thyroxine suspension is available and is used to normalize thyroid function. Currently, only tablet forms of levothyroxine is available in India.
[ncbi.nlm.nih.gov]