What are the items of the 4-month maternity checkup? First, maternity testing and various routine laboratory tests, routine blood and blood type, routine urine, liver and kidney function, fasting blood sugar, screening for infectious diseases such as AIDS and syphilis, and screening for various hepatitis viruses. Secondly, the uterine height and abdominal circumference. In fact, not only in the fourth month of pregnancy to test the uterine height and abdominal circumference, in fact, every maternity checkup should be checked. Third, the initial screening test for Down’s syndrome. Down’s syndrome accounts for 90% of all chromosomal disorders in newborns. And this test method is non-invasive, pre-implementation only requires 12 hours of fasting and drawing venous blood. Fourth, as the pregnancy increases, the weight of the pregnant woman will produce corresponding changes. Fifth, edema. Pregnant women who find themselves with more serious edema, when they press with their fingers by themselves, there are obvious depressions; swelling does not subside after rest, it is recommended that blood pressure can be measured to prevent hypertensive syndrome of pregnancy. Sixth, ultrasound examination. Although ultrasound is not every time you go for a checkup, you need to do it. But in the fourth month of pregnancy, it is better to do ultrasound examination to see if the placenta position is normal. Seventh, listen to the fetal heartbeat. When you reach the 4th month of pregnancy, you can use Doppler to listen to the fetal heartbeat. Under normal circumstances, the fetal heart rate in the fourth month of pregnancy is usually 120-160 beats per minute.