Which of the following treatments is preferred for hyperthyroidism in pregnancy?

In the context of treating hyperthyroidism during pregnancy, propylthiouracil (PTU) is favored primarily because it has a lower risk of causing fetal complications compared to other options. PTU effectively manages hyperthyroid symptoms while minimizing the exposure of the fetus to potential teratogenic effects that can arise from alternative treatments.

Radioactive iodine is contraindicated during pregnancy due to its potential to cause fetal thyroid damage and other developmental issues. Beta blockers, while useful in symptom management for hyperthyroidism, do not treat the underlying condition and also carry some risks for the fetus if used long-term during pregnancy. Levothyroxine is typically used for hypothyroidism, not hyperthyroidism, making it an inappropriate treatment choice in this scenario.

Therefore, PTU stands out as the preferred treatment because it allows for the effective control of hyperthyroid symptoms while presenting the least risk to both the mother and the developing fetus, making it a thoughtful choice in the delicate context of pregnancy.