Gynaecology & Obstetrics Regarding thyroid gland during pregnancy, false is A Total T4 concentration increases during pregnancy. B Thyroid gland undergoes glandular hyperplasia and increased vascularity during pregnancy. C Elevated TBG levels do not affect free T3 and T4 levels. D Total serum T4 increases sharply between 9 → 18 weeks. 💡 Explanation Regarding thyroid gland during pregnancy, false is ✓ Correct Answer: D. Total serum T4 increases sharply between 9 → 18 weeks.