Do you need to check thyroid function when preparing for pregnancy?

Why should you check your thyroid when trying to get pregnant? Thyroid hormone is an important hormone that promotes growth and development. If thyroid hormone is insufficient during pregnancy preparation and thyroid function is low (hypothyroidism), it may lead to amenorrhea, anovulation, obesity and other problems, making it generally difficult to conceive. Even if successful, the fetus cannot get enough thyroid hormone from the mother, and the fetus may suffer from developmental delays, intellectual disabilities and other problems. Hypothyroidism or hyperthyroidism can easily lead to miscarriage. Hypothyroidism is associated with reduced levels of FSH and LH, which are needed for follicle maturation and ovarian production of estrogen and progesterone, which can cause infertility. Also, thyroid disease often becomes more severe during pregnancy, and thyroid hormones are important for both placental and fetal development. Hyperthyroidism during pregnancy has potential harm to pregnant women and fetuses, such as miscarriage, thyroid storm, preeclampsia, heart failure, placental abruption, etc. It can also cause intrauterine growth arrest, premature birth, stillbirth, congenital malformations, etc. In order to ensure that expectant mothers have sufficient thyroid hormones after pregnancy, it is very necessary to check the thyroid gland before pregnancy.