1.HCG blood test For the accuracy of pregnancy detection, doctors usually recommend to do blood HCG early pregnancy test. The “quantitative” blood test for HCG is more sensitive and accurate than the ordinary “qualitative” urine test with early pregnancy test paper, and its accuracy rate is over 99%. In addition, for multiple pregnancy, ectopic pregnancy, embryonic abnormal development delay, gravida, certain endocrine diseases or tumors, etc., the blood HCG value combined with clinical conditions and other examination results can often be correctly analyzed through a comprehensive analysis. 2.Blood test is mainly used to determine whether the pregnant mother has anemia, mild anemia will not have much effect on the pregnant mother and delivery, but severe anemia may lead to premature delivery, low birth weight babies and other adverse consequences. 3.Blood type check The blood type is usually taken in early pregnancy to facilitate the timely prevention of neonatal hemolysis. The second is to prepare for blood transfusion, once the pregnant woman has a miscarriage in early pregnancy, ectopic pregnancy, placenta praevia, placenta abruptio, etc., and vaginal hemorrhage during childbirth, etc., may cause maternal blood loss and life-threatening. 4, TORCH test TOUCH test is we often say virus four, mainly including rubella virus, cytomegalovirus, toxoplasmosis and herpes simplex virus. Pregnant women infected with these viruses are able to cross the placental barrier to infect the fetus, which may cause serious congenital malformations in the fetus, or even miscarriage. Therefore, it is best to undergo this test at the time of preparation. A normal test is negative, and if the test is positive, the pregnancy should be treated. The test should be performed on an empty stomach. 5.Liver function test This is mainly to check whether the mother-to-be has hepatitis and other diseases, because pregnancy will increase the burden on the liver, if the mother’s liver function is abnormal, one is to reduce the ability to deal with toxic waste substances, resulting in maternal and fetal poisoning. Secondly, it cannot produce various proteins needed by the organism, thus affecting the function of other organs. Thirdly, due to the production of sufficient clotting factors, hemorrhage is very likely to occur during delivery, endangering the mother’s health. In addition. There are many other functions of the liver that can be abnormal and lead to corresponding pathologies. Note that the test requires an empty stomach. 6, Down’s syndrome screening Down’s syndrome screening is a screening test to detect the possibility of Down’s syndrome in the fetus. Generally, two milliliters of blood are taken from a pregnant woman to detect serum alpha-fetoprotein, chorionic gonadotropin and free estriol, and then the risk index of “Down’s syndrome” is calculated by combining the height, weight, age and week of pregnancy. The best time for screening is between 15-20 weeks of pregnancy. The best time to screen for gestational diabetes is during the 15th-20th weeks of pregnancy. Gestational diabetes is a phenomenon that does not occur before pregnancy but only appears or is discovered during pregnancy. Gestational diabetes can directly affect fetal development and increase the risk of a giant baby. Gestational diabetes may also increase the chance of fetal miscarriage, intrauterine growth retardation, malformations, macrosomia, low birth weight and various other disorders, as well as predispose to a variety of neonatal complications, such as bilirubinemia and respiratory distress syndrome. This is why doctors recommend screening for gestational diabetes at 24-28 weeks of pregnancy. It is best to eat a light diet the day before the screening, and not to eat after 8 pm, and not to eat fruits and drinks with high sugar content to avoid affecting the test results.