I. Causes lower IQ in children Experts have confirmed that babies born to women with hypothyroidism are at increased risk for certain diseases, most of which are intellectual and developmental problems. Several studies have shown that pregnant women with clinical hypothyroidism, subclinical hypothyroidism, hypo-T4emia or positive TPOAb can cause a significant increase in miscarriages and complications during pregnancy, and cause fetal brain development disorders, resulting in a 6-8 point drop in IQ in the offspring. Foreign experts studied the IQ levels of 62 offspring born to mothers with hypothyroidism and mild hypothyroidism at 17 weeks of gestation at 7 to 9 years of age. The mean IQ score of the offspring in the group not given maternal levothyroxine treatment was found to be 7 points lower than that of the normal control group, 2 standard deviations below the mean of the normal control group, and 19% of the children had IQ scores below 85 compared to 5% of the normal control group; the mean IQ score of the offspring in the levothyroxine treated group did not differ from that of the normal control group. Domestic scholars have also confirmed that hypothyroidism in women in early pregnancy is an independent risk factor for reduced IQ and motor development scores in offspring. In China, women with the four disorders of clinical hypothyroidism, subclinical hypothyroidism, hypo-T4emia or positive TPOAb account for 10-15% of pregnant women and affect tens of thousands of families, but because mild hypothyroidism has no or only mild clinical symptoms and these symptoms are easily confused with pregnancy reactions, it is not easily diagnosed and in turn leads to a low treatment rate, which ultimately affects the IQ of the fetus. It is now believed that only when hypothyroidism is detected and treated early before or during pregnancy can the offspring be prevented from having an impaired IQ. Therefore, caring for thyroid health, early diagnosis and standardized treatment with levothyroxine are essential for both mother and child. Although the findings that hypothyroidism affects a child’s intellectual development are clear, the link between hypothyroidism and birth defects has only been confirmed in recent years, which many people did not anticipate. New research has found that women with thyroid disease are more likely to give birth to offspring with heart, kidney or brain abnormalities. The study, from the United States, showed that mothers with thyroid disorders (both hypothyroid and hyperthyroid, with hypothyroidism more common) gave birth to babies with birth defects (brain, kidney, heart defects, as well as cleft lip, cleft palate, polydactyly, etc.) at a rate of about 18 percent. In the general population, the percentage of babies with birth defects is only about 3%. Therefore, for women suffering from hypothyroidism and other thyroid diseases, their fetuses are best screened for heart defects and other birth defects at an early age. Third, for women’s health to lose points Hypothyroidism not only affects the next generation, but also has a significant impact on the health of women themselves. One out of every six women in the population is likely to suffer from hypothyroidism. In the medical sense, the high-risk group of hypothyroidism is the group of women over 35 years old. Since the initial stage of hypothyroidism may start with some mild symptoms, it makes women gradually suffer from mental depression and body dysfunction, and even causes women of childbearing age to be unable to conceive and give birth normally. While the pregnancy is over, the new mother is at a higher risk of developing postpartum thyroiditis in the year after delivery: about 7% of women develop abnormal thyroid function within one year after delivery. If not detected and treated in time, hypothyroidism can eventually put patients at a much higher risk of myocardial infarction, kidney failure, and even cognitive impairment in old age.