In general, the fetus should be observed for 2 weeks after the cord blood puncture. After 2 weeks, if no abnormalities appear, the fetus is considered to have passed the risk period. If the fetus is suspected of having certain diseases, including thalassemia, metabolic diseases, chromosomal disorders, etc., cord blood puncture is required to confirm the diagnosis. This test is an invasive procedure and the pregnant woman may experience local bleeding and edema. If the operation is not performed properly, the pregnant woman may develop an infection, leading to intrauterine inflammation or symptoms of abdominal pain. In addition, miscarriage may occur after the puncture test if the embryo is not developing steadily in the uterine cavity. Therefore, the cord blood puncture test should be observed for 2 weeks after the test. If there is no vaginal bleeding or abdominal pain within 2 weeks, the risk period is considered to be passed. In addition, pregnant women are advised to take rest after the procedure and keep the area clean and dry to prevent adverse consequences.