Glucose tolerance test (24-28 weeks): Glucose tolerance test is a glucose compliance test to understand insulin beta-cell function and the body’s ability to regulate blood glucose, and is a method to further diagnose the presence of gestational diabetes. Down’s syndrome screening: Down’s syndrome screening is performed by taking maternal serum and monitoring the concentrations of alpha-fetoprotein, chorionic gonadotropin and free estriol in maternal serum, and calculating the risk factor of having a fetus without congenital defects by taking into account the pregnant woman’s due date, weight, age, and gestational week at the time of blood collection. There are two screening periods: the 9th-13th week of pregnancy, called early pregnancy screening, and the 15th-20th week + 6 days, called mid-pregnancy screening. If the result is high risk, there is no need to panic because further amniocentesis (18-23 weeks) will be performed for fetal karyotype analysis to make a definite diagnosis. ABO blood group antibody test: ABO hemolytic disease is the most common type of maternal-infant hemolytic disorder, mainly occurs in mothers with type O, fetuses with type A or B, and other blood groups are rare. The disease is caused by the fetus receiving the maternal (through the placenta) homologous immune antibodies and the disease develops when the mother has been stimulated by a heterologous antigen to produce the corresponding immune body, and the maternal antibodies enter the fetus through the placenta and the fetus is immunosensitive to this antibody. RPR/HIV: All pregnant women can be tested for syphilis and HIV. If you are RPR/HIV positive, you can receive treatment as early as possible, which is good for your health and will greatly reduce the likelihood of HIV infection in the fetus. Liver and kidney function: The test can detect whether the mother has hepatitis, nephritis and other diseases in time. The burden on the liver and kidneys increases during pregnancy, and if the above indicators exceed the normal range, pregnancy may make the original disease “worse”. Both the pregnant woman and the fetus are constantly metabolizing, and the toxins and wastes produced are naturally much more than when they are not pregnant, and all these toxic wastes are sent to the mother’s liver for processing and then discharged from the body. If the liver functions abnormally, firstly, the detoxification ability is reduced, causing poisoning of the mother and fetus. Secondly, it is unable to produce the various proteins needed collectively, thus affecting the function of other organs. Thirdly, due to the production of sufficient clotting factors, hemorrhage is very likely to occur during delivery, which can crisis the mother’s health. Hepatitis B diathesis: Hepatitis B virus can cause serious illness, liver damage and even death. Therefore, checking to see if you are a carrier of the hepatitis B virus will help your doctor decide whether your baby is born or if you need immediate treatment, which will most likely prevent your baby from being infected by the hepatitis B virus. Hepatitis C: Hepatitis C can lead to chronic inflammatory necrosis and fibrosis of the liver, which in some cases can progress to cirrhosis and even hepatocellular carcinoma (HCC). A gong three: A gong three is a response to the state of affairs of the thyroid physiological function indicators, which amortization matter pituitary secretion of thyroid stimulating hormone, ft3, ft4 is the thyroid gland cut body secretion of hormones. The data of each hormone may fall, representing different diseases. 3D ultrasound (fetal malformation screening): Because 3D ultrasound can surface imaging, fetal congenital malformations such as cleft palate, limb developmental malformations, meningeal bulge, spina bifida, abdominal wall bifida can be clearly detected. The diagnostic information of 3D ultrasound is also helpful for doctors to make judgment. 3D ultrasound is the main method to check the development of the fetus and screen for structural malformations. Trace elements: Prenatal trace element examination is mainly to detect the level of seven elements in the human body, namely copper, lead, cadmium, calcium, magnesium, iron and zinc. Calcium: Calcium helps the development of bones and is very helpful to the growth of the fetus. Women can store sufficient amount of calcium in their bodies early before pregnancy for the period of pregnancy. The right amount of supplementation should be done during pregnancy to ensure good fetal development Copper: For the fetus, copper can affect the activity of copper enzymes or copper-requiring enzymes and the synthesis of collagen and elastin. Copper deficiency predisposes to placental hypofunction and hematopoietic dysfunction, resulting in delayed fetal development. Excessive copper, like deficiency, affects the normal development and differentiation of the embryo and can easily lead to malformation or stillbirth. Zinc: zinc deficiency, zinc-dependent concentrated polymerase activity decreases, especially affecting the development of neural tissue, so that fetal growth and nervous system development is not coordinated, especially in the 20-60 days of gestation, the critical period for the formation of fetal organ differentiation, it is very easy to seriously damage the embryo, fetal development process, and the central nervous system abnormalities, congenital heart disease, hypospadias and other congenital malformations iron: iron is the formation of hemoglobin The hemoglobin can help carry oxygen to the fetus, so it is necessary to take a lot of iron during pregnancy. In addition, a large amount of blood is lost during delivery, so the intake of iron should be increased during pregnancy. Lead: Lead is a toxic heavy metal that can cause damage to the human nervous system and cause mental retardation in the fetus. Cord blood flow: The cord blood flow is checked to determine the development of the fetus in utero, such as whether there is intrauterine growth retardation, to determine whether there is a tendency for the occurrence of hypertensive syndrome during pregnancy, and to determine whether there is intrauterine hypoxia in the fetus. Abnormal fetal chromosomal disorders and congenital malformations may also be present. Abnormal umbilical blood flow may also be associated with developmental defects and histological abnormalities of the placenta. Bile acids: Bile acids are an important component of bile and play an important role in fat metabolism. Bile acids are mainly present in the enterohepatic circulatory system and play a protective role through recirculation. Only a small fraction of bile acids enters the peripheral circulation. The driving forces for the enterohepatic circulation of bile acids are the transporter system of hepatocytes – absorption of bile acids and their secretion into bile, cholecystokinin-induced gallbladder contraction, propulsive peristalsis of the small intestine, active transport by the ileal mucosa and inflow of blood into the portal vein. Placental function E3: The placental function test can indirectly determine the fetal status and is an intrauterine monitoring of the fetus during pregnancy. It can detect hidden fetal distress at an early stage and help to take appropriate measures in time so that the fetus can grow and develop in good condition until it is delivered when it has the ability to live outside the uterus. Coagulation IV: In normal pregnancy and gestational hypertension syndrome, the blood is in a hypercoagulable state and coagulation indicators such as activated partial thromboplastin time (APTT), prothrombin time (TT), prothrombin time (PT) and fibrinogen (FIB) are altered in corrected normals. This change will lead to diffuse intravascular coagulation (DIC) in about 0.03% to 0.13% of people, directly endangering the safety of pregnant women and infants. Therefore. Testing of the four indicators of coagulation in pregnant women before delivery can help in the early detection and timely treatment of DIC.