Preconception eugenics examination should be done. In addition to general physical examination, blood and urine routine, hepatitis B surface antigen, gynecological examination, especially examination of uterus and cervix, should be performed to rule out the presence of uterine fibroids, ovarian cysts, early cancer of cervix, etc. Otherwise, these diseases will put pregnant women in a difficult dilemma. In addition, thyroid function tests should be performed. Certain thyroid disorders are subclinical hyperthyroidism or hypothyroidism, with no clinical symptoms but only abnormal laboratory test results. These conditions can also affect fertility, leading to miscarriage and poor pregnancy outcomes. There are also tests for specific pathogens, namely Toxoplasma gondii, rubella virus, cytomegalovirus and herpes simplex virus, referred to as TORCH tests. These specific pathogens are one of the most important causes of intrauterine infections in fetuses and birth defects in newborns. the TORCH test is usually performed 3 months before preparing for pregnancy, and should not be neglected, especially for women who have frequent occupations with children or who like to eat raw meat, sushi, or rare steaks. the results of the TORCH test, IgG positive indicates previous infection and IgM positive indicates If you are infected, you will need to continue to follow up to confirm the diagnosis. If the infection is ongoing, treatment is required before pregnancy can occur. In fact, Toxoplasma gondii, rubella and other viruses can usually be avoided by washing hands in daily life, separating raw and cooked dishes, and cooking them thoroughly. If a TORCH test is performed after pregnancy and the infection is found to be ongoing, other testing methods, such as amniotic fluid extraction, are required to further confirm the diagnosis. If other indicators of infection remain positive or if the fetus is in poor condition, the pregnancy should be terminated.