Regarding thyroid gland during pregnancy, false is
Total serum T4 increases sharply between 6 → 9 weeks and reaches plateau at 18 weeks.
Total T4 concentration increases during pregnancy.
Thyroid gland undergoes glandular hyperplasia and increased vascularity during pregnancy.
Elevated TBG levels do not affect free T3 and T4 levels.
Total serum T4 increases sharply between 9 → 18 weeks.