Lenin once said: “To give birth to a child, this is something that even a hen does”. Indeed, reproduction and reproduction are the instinctive activities of all living matter in the biological world. Although pregnancy is a normal physiological phenomenon for women as advanced organisms, failure to do the necessary examinations during pregnancy may lead to the birth of defective children and cause a heavy burden to families and society. Therefore, a good scientific examination is the key link to ensure eugenics. Routine examination: 1. The examination should be done as early as possible after pregnancy. In the fifth week of pregnancy, the rhythmic fetal heartbeat seen in the gestational sac in the uterus by B-type ultrasound can confirm the diagnosis of early pregnancy and live fetus. Later, before 28 weeks of gestation, the examination should be performed once every 4 weeks. From 28 to 36 weeks of gestation, the examination will be performed once every 2 weeks. After 36 weeks of gestation, check once a week. 2.First comprehensive checkup will be performed from 7 to 20 weeks of pregnancy, including blood and urine routine, blood group, coagulation function, liver and kidney function, hepatitis B marker, anti-HIV, HCV, RPR, teratogenic six items, hemoglobin analysis, electrocardiogram, Down’s syndrome screening, etc. 3. Blood glucose screening after 24 weeks of pregnancy and monthly review of blood and urine routine. 4.Gestational hypertension monitoring will be performed around 20 and 30 weeks of gestation. 5.Umbilical blood flow monitoring around 32 weeks of gestation. 6.Fetal heart monitoring will be performed weekly from 36 weeks of gestation onwards. 7.Weekly blood and urine examination from 37 weeks of pregnancy onwards. 8.Re-check coagulation function, liver and kidney function at 37 weeks of pregnancy. Special examinations: (examinations for congenital anomalies and hereditary diseases) 1. Take chorionic villus in early pregnancy or take amniotic fluid in the middle of pregnancy (16-20 weeks) for karyotype analysis to understand chromosome number and structural changes. Ultrasound examination can diagnose anencephaly, spina bifida, hydrocephalus and other malformations; determination of alpha-fetoprotein (AFP) in amniotic fluid can diagnose open neural tube defect malformations. 3.Amniotic fluid enzymology test can diagnose fetal metabolic defects. 4.Peripheral blood of pregnant women can be taken to extract fetal cells for genetic examination. 5.Intra-amniotic fetography can diagnose fetal body surface abnormalities, etc.