Theoretically, a pregnancy file can be created when the fetus is diagnosed as intrauterine, but most of them are created after the ninth week of pregnancy, during the maternity checkup, or around the 12th week of pregnancy, when the baby has basically stabilized. Pregnancy documentation means that the hospital will create a special file for the pregnant woman, and the results will be recorded in this file during the subsequent maternity check-ups, so that the health of the fetus and the mother can be followed up and discovered at any time. The following items should be checked: height, weight, abdominal circumference, uterine height, blood type, blood pressure, blood sugar, hepatitis B, thyroid, electrocardiogram, ultrasound, routine blood, urine, leukocyte, fetal heart, AIDS, syphilis, liver and kidney function, rubella virus, toxoplasmosis, herpes simplex virus, cytomegalovirus, etc.