1, blood routine: before pregnancy or early pregnancy must be checked to clarify whether anemia, white blood cells are normal, platelets are normal, if all three are low, may be aplastic anemia, very dangerous; if platelets are low, need to clarify the cause; if anemia, need to clarify the cause and correct, to prevent postpartum bleeding. With the increase of pregnancy week, it is necessary to recheck the blood routine to detect anemia and correct it in time. 2.Urinary routine: a must-check item to see if there is urine protein, occult blood, if there is, need to clarify whether there is glomerulonephritis or nephrotic syndrome, if there is unfavorable to pregnancy, or even can not continue pregnancy. If the urine routine is normal, but the protein appears in late pregnancy, the blood pressure is high, there are complications: hypertensive disorders in pregnancy. 3, liver function and kidney function: normal, pregnancy generally do not need to review, if the blood pressure is high, and the emergence of urine protein, you need to review the liver function, liver enzymes are elevated, indicating a serious condition. 4, five infections: to see if there is hepatitis B, AIDS, hepatitis C, syphilis, etc. If there is hepatitis B, the child needs to be injected with hepatitis B immunoglobulin to prevent hepatitis B within 12 hours after delivery. 5. Blood type: If the pregnant woman has O blood type and her husband has a blood type other than O, hemolysis may occur and antibody potency needs to be checked during pregnancy. If the pregnant woman is Rh-negative, hemolysis may also occur and needs to be monitored. 6, A function: should be checked before pregnancy or before 8 weeks of pregnancy, if there is hypothyroidism or subclinical hypothyroidism, it should be treated as early as possible to treat TSH to within the normal range, otherwise it will affect the intelligence of the child. 7, blood sugar: If fasting blood sugar is greater than 7,0 in early pregnancy, it means there is diabetes; if blood sugar is normal, check sugar screening at 24 —-28, fasting blood sugar greater than or equal to 5,1 is gestational diabetes. 8, 12 weeks to check NT (color ultrasound to check the fetal nuchal translucency), if abnormal, it means the possibility of chromosomal abnormalities, need further examination. 9, 16 —-18 weeks to check the Down screening, if high risk, need to check the non-invasive DNA, or directly check the amniocentesis, the purpose is to clarify whether there are chromosomal abnormalities. 10.Check the system ultrasound around 22 weeks, the first major abnormality. 11.26 weeks for 4D ultrasound, the second major abnormality, to further screen for macroscopic abnormalities. 12, 24 —-28 check sugar screening, if diagnosed with gestational diabetes, need to control blood sugar, otherwise the fetus will have malformations and many fetal complications. 13, no comorbidities and complications, after 35 weeks, start fetal heart monitoring to understand the fetal intrauterine safety and security.