The free items of pregnancy check-ups are mainly related to local policies, and the free pregnancy check-ups are different in each place with different policies. The following items are free of charge in some areas: 1. Routine pregnancy test: including height, weight, gynecological examination, blood routine, urine routine, ABO blood group, hepatitis B, liver function, etc.; 2. Black and white ultrasound: early pregnancy is mainly to determine intrauterine pregnancy and the number of fetal sacs, mid pregnancy to check the size and development of the fetus, late pregnancy to see the fetus’ head, abdominal circumference, limb bone diameter line, placenta, amniotic fluid volume, fetal umbilical cord blood flow parameters, etc. The second trimester looks at the size and development of the fetus. Usually in early pregnancy the uterus is not large enough to come out of the pelvis, so it is necessary to hold enough urine to use the full bladder to help see the uterus as well as the fallopian tubes and ovaries. In the middle and late stages of pregnancy, you generally no longer need to hold urine, unless there are special circumstances, such as low placenta position and unexplained vaginal bleeding, etc., you need to use the full bladder to see the lower uterine tissues and blood flow; 3, blood sugar: 24-28 weeks of pregnancy for diabetes screening, you need to fast a day in advance, once the gestational diabetes, must be actively treated and handled, otherwise it is easy to cause intrauterine distress, fetal If the pregnant woman is carrying HIV, she can start medication during pregnancy to prevent the baby from being infected during the pregnancy; 5. The blood of the pregnant woman, combined with her age, weight and week of pregnancy to determine the risk factor of the fetus suffering from congenital stupidity and neural tube defects, usually at 14-20 weeks. If the result of Down screening shows that the fetus has a higher risk of Down syndrome, further confirmatory tests, such as amniocentesis or chorionic villus test, should be performed. However, it should be noted that the above free maternity checkups need to be performed at the state-regulated Crown Health Centers or Maternal and Child Health Centers, and you can enjoy these policies only after providing the relevant certificates and going through the procedures.