Which is NOT a maternal complication of hyperthyroidism in pregnancy?

Which is NOT a maternal complication of hyperthyroidism in pregnancy?

• A. Preterm labor
• B. Fetal goiter
• C. Preeclampsia
• D. Maternal thyroid crisis

Answer: (B)

The key idea is distinguishing complications that affect the mother from those that affect the fetus. In pregnancy with hyperthyroidism, the mother is at risk for issues like preterm labor, preeclampsia, and even thyroid storm if not properly controlled. Fetal thyroid problems can occur because antibodies or excess hormones can cross the placenta and stimulate the fetus, leading to fetal thyrotoxicosis and, in some cases, fetal goiter. Fetal goiter is a fetal condition caused by placental transfer affecting the fetus, not a complication that directly impacts the mother. Therefore, fetal goiter is not a maternal complication, even though it’s associated with maternal hyperthyroidism.

The key idea is distinguishing complications that affect the mother from those that affect the fetus. In pregnancy with hyperthyroidism, the mother is at risk for issues like preterm labor, preeclampsia, and even thyroid storm if not properly controlled. Fetal thyroid problems can occur because antibodies or excess hormones can cross the placenta and stimulate the fetus, leading to fetal thyrotoxicosis and, in some cases, fetal goiter. Fetal goiter is a fetal condition caused by placental transfer affecting the fetus, not a complication that directly impacts the mother. Therefore, fetal goiter is not a maternal complication, even though it’s associated with maternal hyperthyroidism.