The 5 items of thyroid function must be checked by every pregnant woman. Pregnant women in the early stage of pregnancy need to pay attention to perfect the various tests, including blood routine, coagulation function, biochemical examination, thyroid function and so on. Because if a pregnant woman suffers from thyroid function abnormality, it is easy to affect the fetus in the womb, and if a pregnant woman suffers from hypothyroidism, it is easy to cause the fetus to have mental retardation, and the newborn congenital hypothyroidism and so on. Therefore, the 5-item thyroid function test is a must for every pregnant woman, and it is recommended that pregnant women should pay attention to all the tests in order to detect any abnormalities in their body in advance. Pregnant women must pay attention to rest more during pregnancy, and if there is any abdominal pain or abnormal vaginal bleeding, etc., they must seek medical treatment as soon as possible.