A prenatal clinic screens a woman who eats a vegan diet and avoids iodized salt. Her urinary iodine concentration is low. Which immediate recommendation most directly addresses the fetal risk?

• A. Start an iodine-containing prenatal supplement per clinical guidelines and counsel on using iodized salt or iodine-rich foods safe for pregnancy, while monitoring iodine status.
• B. Recommend stopping prenatal visits and relying on infant screening after birth since fetal thyroid development cannot be modified prenatally.
• C. Advise eating large daily quantities of raw seaweed without portion guidance because plant sources will correct iodine immediately and permanently.
• D. Prescribe high-dose iodine tablets at levels above the UL because high doses quickly saturate fetal thyroid tissue and guarantee protection.

Answer: (A)