Hypothyroidism is very harmful, especially to pregnant women and their offspring, and should be taken seriously. Before pregnancy TH dose should be adjusted under doctor’s guidance to bring serum TSH to normal range. Usually take levothyroxine sodium tablets for about 3 months of treatment and under the guidance of a doctor before preparing for pregnancy. Prepare adequately for pregnancy to provide a fertile breeding ground for the fetus! Pregnancy A study found that babies born to untreated mothers-to-be with mild hypothyroidism will have intelligence scores that are 8-10 points lower than those of babies born to healthy mothers-to-be. This is because thyroid hormone is essential for the neurological development of the fetal brain. Before 20 weeks of gestation, the fetus’ thyroid function is not yet fully established, and its brain development depends mainly on thyroid hormones from the mother. Timely supplementation of thyroid hormone during pregnancy can prevent the baby from developing “cretinism”. Generally speaking, the dose of medication for hypothyroid mothers should be increased by 30% to 50% compared to the pre-pregnancy period to meet the needs of the growing baby. After delivery Generally speaking, TH is not secreted with breast milk, so it has little effect on the baby, and the hypothyroid mother can breastfeed. However, during the breastfeeding period, you should still insist on follow-up and regular review. Check your nail function before pregnancy to nip the danger of hypothyroidism in the bud. Once hypothyroidism is detected, it is important to treat it promptly to minimize the risk of hypothyroidism.