The first prenatal checkup is conducted in the third trimester, usually at 12-14 weeks of pregnancy, and a perinatal care booklet is created so that a systematic record of the delivery can be made. There are relatively more items in the 1st prenatal checkup to comprehensively check the health of the mother-to-be and to rule out ectopic pregnancy, gravida, and so on. Those who have not had a marriage or pregnancy test before should also add a screening for thalassemia; those who have pets at home should add a parasite test. The main items of the maternity test in the third month of pregnancy are: 1. Measurement of height: only once in the whole pregnancy. The doctor will use the ratio of height to weight to estimate whether you are overweight or underweight, as well as the size of your pelvis. 2.Measure your weight: a mandatory item in every pregnancy test. Fetal growth is detected indirectly through the weight of the mother-to-be. Weight gain during pregnancy is about 12.5 kilograms, with an average increase of 0.5 kilograms per week in late pregnancy. (Only for the test value, each person will have different differences.) 3. Measurement of blood pressure: a mandatory item in every pregnancy checkup. High blood pressure is one of the symptoms of pre-eclampsia and it will affect the development and growth of the fetus. 4.Questioning medical history: Ask the mother-to-be and her family members what diseases they have had, whether they have been exposed to harmful substances within six months, etc., menstrual history, marital history, etc. 5, listen to the fetal heart: the 12th and 13th weeks of pregnancy, you can already hear the fetal heart sound. Hearing the fetal heartbeat indicates that the fetus in the abdomen is alive. 6. Measure uterine height and abdominal circumference: Every obstetric examination should measure the uterine height and abdominal circumference, and according to the uterine height, we should draw the curve of pregnancy chart to know the development of the fetus in the womb, and whether it is induced with the retardation or the huge baby. 7, routine blood tests: check the blood pigment, determine whether the mother-to-be anemia. Check the blood type to prevent hemolytic disease of the newborn, if the husband is A, B or AB blood type, the pregnant woman is O blood type, the birth of a small child may have ABO blood type incompatibility. 8, urine routine examination: check whether there is protein and sugar in the urine, suggesting the presence of pregnancy hypertension and other diseases. 9, liver, kidney function test: check pregnant mothers have hepatitis, nephritis, etc., the burden on the liver and kidneys increases when pregnant, such as liver and kidney function is not normal, pregnancy will make the original disease worse. 10, check AIDS antibody: check whether the pregnant mother is infected with AIDS, mother-to-child transmission is one of the main ways of transmission of AIDS. 11, check alpha-fetoprotein: screening for neurological diseases, such as: anencephaly and spina bifida. Normal value: <20. 12, check hepatitis B, syphilis: check whether the pregnant mother is infected with hepatitis B virus, syphilis spirochete. If she is infected, the doctor will take measures to prevent mother-child interruption during delivery. 13, check hepatitis C virus: check whether the mother-to-be is infected with hepatitis C virus. 14, check for viral infections: if the mother-to-be is infected with a virus before the fourth month of pregnancy, the fetus may have congenital malformations or even miscarriage. 15.Electrocardiogram (ECG): to rule out heart disease to confirm whether the mother-to-be can bear the labor; if the ECG is abnormal, further examination of echocardiogram can be carried out.